Merge pull request #5 from rug-advoop/improvements_1

Improvements and new version in development

pom.xml

@@ -21,10 +21,6 @@
     </build>
     <packaging>jar</packaging>
 
-    <properties>
-        <jackson.version>2.9.6</jackson.version>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>org.apache.commons</groupId>
@@ -34,12 +30,12 @@
         <dependency>
             <groupId>commons-cli</groupId>
             <artifactId>commons-cli</artifactId>
-            <version>RELEASE</version>
+            <version>1.4</version>
         </dependency>
         <dependency>
-            <groupId>commons-email</groupId>
+            <groupId>org.apache.commons</groupId>
             <artifactId>commons-email</artifactId>
-            <version>RELEASE</version>
+            <version>1.5</version>
         </dependency>
         <dependency>
             <groupId>org.jetbrains</groupId>
@@ -50,22 +46,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>RELEASE</version>
+            <version>4.5.6</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-core</artifactId>
-            <version>${jackson.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-annotations</artifactId>
-            <version>${jackson.version}</version>
         </dependency>
         <!-- Github API Object Library -->
         <dependency>
@@ -73,11 +54,22 @@
             <artifactId>github-api</artifactId>
             <version>1.93</version>
         </dependency>
-        <!-- SQLite JDBC Driver -->
+        <!-- MySQL JDBC Driver -->
         <dependency>
-            <groupId>org.xerial</groupId>
+            <groupId>mysql</groupId>
-            <artifactId>sqlite-jdbc</artifactId>
+            <artifactId>mysql-connector-java</artifactId>
-            <version>3.23.1</version>
+            <version>8.0.12</version>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>1.4.197</version>
+        </dependency>
+        <!-- Hibernate Database ORM -->
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>5.3.6.Final</version>
         </dependency>
     </dependencies>
     

src/main/java/nl/andrewlalis/Main.java

@@ -1,11 +1,19 @@
 package nl.andrewlalis;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
-import nl.andrewlalis.ui.control.command.executables.*;
+import nl.andrewlalis.command.executables.*;
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.model.StudentTeam;
+import nl.andrewlalis.model.database.DbHelper;
 import nl.andrewlalis.ui.view.InitializerApp;
+import nl.andrewlalis.ui.view.ManagementView;
+import nl.andrewlalis.ui.view.StartView;
 import nl.andrewlalis.util.CommandLine;
 import nl.andrewlalis.util.Logging;
+import nl.andrewlalis.util.TeamGenerator;
 
+import java.io.IOException;
+import java.util.List;
 import java.util.Map;
 import java.util.logging.Logger;
 
@@ -16,6 +24,11 @@ public class Main {
 
     private static final Logger logger = Logger.getGlobal();
 
+    /**
+     * The main application's view, which should be able to be referenced in many places.
+     */
+    private static ManagementView managementView;
+
     public static void main(String[] args) {
 
         // Parsed command line arguments.
@@ -24,6 +37,41 @@ public class Main {
         // Initialize logger.
         Logging.setup();
 
+        //startOldVersion(userOptions);
+
+        logger.info("GithubManager for Github Repositories in Educational Organizations.\n" +
+                "© Andrew Lalis (2018), All rights reserved.\n" +
+                "Program initialized.");
+
+        GithubManager manager = new GithubManager();
+        managementView = new ManagementView(manager);
+
+        initializeTestingData();
+        StartView startView = new StartView(manager, "InitializerTesting", userOptions.get("token"));
+    }
+
+    /**
+     * @return The management view used for the application.
+     */
+    public static ManagementView getManagementView() {
+        return managementView;
+    }
+
+    private static void initializeTestingData() {
+        try {
+            List<StudentTeam> teams = TeamGenerator.generateFromCSV("/home/andrew/Documents/School/ta/GithubInitializer/student-groups.csv", 2);
+            DbHelper.saveStudentTeams(teams);
+            managementView.updateModels();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Legacy code to run the old version of the application.
+     * @param userOptions The options the user has entered in the command line.
+     */
+    public static void startOldVersion(Map<String, String> userOptions) {
         // Command executor which will be used by all actions the user can do.
         CommandExecutor executor = new CommandExecutor();
 
@@ -41,10 +89,7 @@ public class Main {
         executor.registerCommand("delete_repos", new DeleteRepos());
         executor.registerCommand("delegate_student_teams", new DelegateStudentTeams(app));
         executor.registerCommand("setup_student_repos", new SetupStudentRepos(app));
-
+        executor.registerCommand("list_repos", new ListRepos());
-        logger.info("GithubManager for Github Repositories in Educational Organizations.\n" +
-                "© Andrew Lalis (2018), All rights reserved.\n" +
-                "Program initialized.");
     }
 
 }

src/main/java/nl/andrewlalis/command/CommandExecutor.java

@@ -1,8 +1,8 @@
-package nl.andrewlalis.ui.control.command;
+package nl.andrewlalis.command;
 
-import java.util.Arrays;
+import nl.andrewlalis.command.executables.ExecutableContext;
-import java.util.HashMap;
+
-import java.util.Map;
+import java.util.*;
 import java.util.logging.Logger;
 
 /**
@@ -23,8 +23,20 @@ public class CommandExecutor {
      */
     private Map<String, Executable> commands;
 
+    /**
+     * A list of all the executables which have failed to execute.
+     */
+    private List<ExecutableContext> failedExecutables;
+
+    /**
+     * A list of all executables which have been run successfully.
+     */
+    private List<ExecutableContext> successfulExecutables;
+
     public CommandExecutor() {
         this.commands = new HashMap<>();
+        this.failedExecutables = new ArrayList<>();
+        this.successfulExecutables = new ArrayList<>();
     }
 
     /**
@@ -64,12 +76,24 @@ public class CommandExecutor {
     public void executeCommand(String commandName, String[] args) {
         if (this.commands.containsKey(commandName)) {
             logger.info("Command executed: " + commandName + ' ' + Arrays.toString(args));
-            if (!this.commands.get(commandName).execute(args)) {
+            Executable executable = this.commands.get(commandName);
+            ExecutableContext context = new ExecutableContext(executable, args);
+            if (!executable.execute(args)) {
                 logger.warning("Command did not execute successfully.");
+                this.failedExecutables.add(context);
+            } else {
+                this.successfulExecutables.add(context);
             }
         } else {
             logger.warning(commandName + " is not a valid command.");
         }
     }
 
+    /**
+     * Retries all failed executables, and if successful, removes them from the queue.
+     */
+    public void rerunFailedExecutables() {
+        this.failedExecutables.removeIf(ExecutableContext::runAgain);
+    }
+
 }

src/main/java/nl/andrewlalis/command/Executable.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.ui.control.command;
+package nl.andrewlalis.command;
 
 /**
  * Classes which implement this interface tell that they may be 'executed', either via command-line, or through the use

src/main/java/nl/andrewlalis/command/executables/ArchiveRepos.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
 

src/main/java/nl/andrewlalis/command/executables/DefineTaTeams.java

@@ -1,8 +1,8 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
-import nl.andrewlalis.ui.view.dialogs.DefineTaTeamsDialog;
 import nl.andrewlalis.ui.view.InitializerApp;
+import nl.andrewlalis.ui.view.dialogs.DefineTaTeamsDialog;
 
 /**
  * This executable is slightly different from the others, in that it opens up a user interface to make editing TA teams

src/main/java/nl/andrewlalis/command/executables/DelegateStudentTeams.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
 import nl.andrewlalis.model.StudentTeam;

src/main/java/nl/andrewlalis/command/executables/DeleteRepos.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
 

src/main/java/nl/andrewlalis/command/executables/ExecutableContext.java

@@ -0,0 +1,34 @@
+package nl.andrewlalis.command.executables;
+
+import nl.andrewlalis.command.Executable;
+
+/**
+ * An object to record a specific executable's execution context (args given), with the ability to re-run the executable
+ * if a failure occurs.
+ */
+public class ExecutableContext {
+
+    /**
+     * The executable object, without any contextual information.
+     */
+    private Executable executable;
+
+    /**
+     * A list of arguments given to the executable when it was called.
+     */
+    private String[] args;
+
+    public ExecutableContext(Executable executable, String[] args) {
+        this.executable = executable;
+        this.args = args;
+    }
+
+    /**
+     * Runs the stored executable again with the same arguments it was originally given.
+     * @return True if the execution was successful, or false otherwise.
+     */
+    public boolean runAgain() {
+        return this.executable.execute(this.args);
+    }
+
+}

src/main/java/nl/andrewlalis/command/executables/GenerateAssignmentsRepo.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
 

src/main/java/nl/andrewlalis/command/executables/GithubExecutable.java

@@ -1,7 +1,7 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
+import nl.andrewlalis.command.Executable;
 import nl.andrewlalis.git_api.GithubManager;
-import nl.andrewlalis.ui.control.command.Executable;
 
 /**
  * Represents an executable which interacts with github, and therefore needs access to a Github

src/main/java/nl/andrewlalis/command/executables/ListErrors.java

@@ -1,7 +1,7 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
+import nl.andrewlalis.command.Executable;
 import nl.andrewlalis.model.error.Error;
-import nl.andrewlalis.ui.control.command.Executable;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import java.util.logging.Logger;

src/main/java/nl/andrewlalis/command/executables/ListRepos.java

@@ -0,0 +1,48 @@
+package nl.andrewlalis.command.executables;
+
+import nl.andrewlalis.git_api.GithubManager;
+import org.kohsuke.github.GHRepository;
+
+import java.util.List;
+import java.util.logging.Logger;
+
+/**
+ * This executable shows a list of repositories with a given substring.
+ */
+public class ListRepos extends GithubExecutable {
+
+
+    /**
+     * The logger for outputting debug info.
+     */
+    private static final Logger logger = Logger.getLogger(ListRepos.class.getName());
+    static {
+        logger.setParent(Logger.getGlobal());
+    }
+
+    @Override
+    protected boolean executeWithManager(GithubManager manager, String[] args) {
+        if (args.length < 1) {
+            return false;
+        }
+
+        List<GHRepository> repos = manager.listReposWithPrefix(args[0]);
+        logger.info(outputRepoList(repos));
+
+        return true;
+    }
+
+    /**
+     * Prints a nicely formatted list of repositories to a string.
+     * @param repos The list of repositories.
+     * @return A string representation of the list of repos.
+     */
+    private static String outputRepoList(List<GHRepository> repos) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("List of ").append(repos.size()).append(" repositories:\n");
+        for (GHRepository repo : repos) {
+            sb.append('\t').append(repo.getName()).append('\n');
+        }
+        return sb.toString();
+    }
+}

src/main/java/nl/andrewlalis/command/executables/ReadStudentsFile.java

@@ -1,7 +1,7 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
+import nl.andrewlalis.command.Executable;
 import nl.andrewlalis.model.StudentTeam;
-import nl.andrewlalis.ui.control.command.Executable;
 import nl.andrewlalis.ui.view.InitializerApp;
 import nl.andrewlalis.util.FileUtils;
 

src/main/java/nl/andrewlalis/command/executables/SetupStudentRepos.java

@@ -1,9 +1,10 @@
-package nl.andrewlalis.ui.control.command.executables;
+package nl.andrewlalis.command.executables;
 
 import nl.andrewlalis.git_api.GithubManager;
 import nl.andrewlalis.model.StudentTeam;
 import nl.andrewlalis.model.TATeam;
 import nl.andrewlalis.ui.view.InitializerApp;
+import org.kohsuke.github.GHRepository;
 
 import java.util.List;
 
@@ -23,13 +24,17 @@ public class SetupStudentRepos extends GithubExecutable {
 
     @Override
     protected boolean executeWithManager(GithubManager manager, String[] args) {
-        if (args.length < 1) {
+        if (args.length < 2) {
             return false;
         }
         List<TATeam> taTeams = this.app.getOrganization().getTaTeams();
         for (TATeam team : taTeams) {
             for (StudentTeam studentTeam : team.getStudentTeams()) {
-                manager.setupStudentRepo(studentTeam, team, args[0]);
+                GHRepository assignmentsRepo = manager.getRepository(args[1]);
+                if (assignmentsRepo == null) {
+                    return false;
+                }
+                manager.setupStudentRepo(studentTeam, team, args[0], assignmentsRepo);
             }
         }
         return true;

src/main/java/nl/andrewlalis/git_api/GithubManager.java

@@ -25,17 +25,13 @@ import java.util.logging.Logger;
  */
 public class GithubManager {
 
-    /**
-     * The assignments repository where students will get assignments from.
-     */
-    private GHRepository assignmentsRepo;
-
     /**
      * Github object for API interactions.
      */
     private GitHub github;
     private GHOrganization organization;
     private String accessToken;
+    private String organizationName;
 
     /**
      * The logger for outputting debug info.
@@ -45,15 +41,121 @@ public class GithubManager {
         logger.setParent(Logger.getGlobal());
     }
 
+    /**
+     * Creates an empty github manager, which at this point, essentially just allocates the object in memory.
+     */
+    public GithubManager() {
+
+    }
+
     public GithubManager(String organizationName, String accessToken) {
+        this.organizationName = organizationName;
         this.accessToken = accessToken;
+    }
+
+    /**
+     * Gets the organization that this manager manages.
+     * @return The Organization object that this manager was constructed for.
+     * @throws IOException If the organization does not exist or some other error occurs.
+     */
+    private GHOrganization getOrganization() throws IOException {
+        if (this.github == null || this.organization == null) {
+            this.github = GitHub.connectUsingOAuth(this.accessToken);
+            this.organization = this.github.getOrganization(this.organizationName);
+        }
+
+        return this.organization;
+    }
+
+    /**
+     * Determine if the manager is currently connected to github with the current organization name and access token.
+     * @return True if the manager is connected, or false otherwise.
+     */
+    public boolean validate() {
         try {
-            this.github = GitHub.connectUsingOAuth(accessToken);
+            this.organization = this.getOrganization();
-            this.organization = this.github.getOrganization(organizationName);
+            return this.organization != null;
         } catch (IOException e) {
-            logger.severe("Unable to make a GithubManager with organization name: " + organizationName + " and access token: " + accessToken);
+            return false;
+        }
+    }
+
+    public void setOrganizationName(String name) {
+        this.organizationName = name;
+        this.github = null;
+        this.organization = null;
+    }
+
+    public void setAccessToken(String token) {
+        this.accessToken = token;
+        this.github = null;
+        this.organization = null;
+    }
+
+    /**
+     * Determines if a repository exists in the current organization.
+     * @param repoName The name of the repository.
+     * @return True if the repository exists, false otherwise.
+     */
+    public boolean repoExists(String repoName) {
+        try {
+            GHRepository repo = this.getOrganization().getRepository(repoName);
+            return repo != null;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Determines if a team exists in the current organization.
+     * @param teamName The name of the team.
+     * @return True if the team exists, false otherwise.
+     */
+    public boolean teamExists(String teamName) {
+        try {
+            GHTeam team = this.getOrganization().getTeamByName(teamName);
+            return team != null;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Returns a list of repositories with the given substring.
+     * @param substring A string which all repositories should contain.
+     * @return A List of repositories whose names contain the given substring.
+     */
+    public List<GHRepository> listReposWithPrefix(String substring) {
+        List<GHRepository> repos = new ArrayList<>();
+        try {
+            List<GHRepository> allRepos = this.getOrganization().listRepositories().asList();
+            for (GHRepository repo : allRepos) {
+                if (repo.getName().contains(substring)) {
+                    repos.add(repo);
+                }
+            }
+        } catch (Exception e) {
+            logger.severe("IOException while listing repositories in the organization.");
             e.printStackTrace();
         }
+
+        return repos;
+    }
+
+    /**
+     * Gets a repository by name.
+     * @param name The name of the repository.
+     * @return The repository with the given name, or null if none exists.
+     */
+    public GHRepository getRepository(String name) {
+        System.out.println(name);
+        try {
+            return this.getOrganization().getRepository(name);
+        } catch (IOException e) {
+            logger.severe("No repository with name: " + name + " exists.");
+            e.printStackTrace();
+            return null;
+        }
     }
 
     /**
@@ -64,7 +166,7 @@ public class GithubManager {
         List<TATeam> teams = new ArrayList<>();
         try {
             Random rand = new Random();
-            for (Map.Entry<String, GHTeam> entry : this.organization.getTeams().entrySet()) {
+            for (Map.Entry<String, GHTeam> entry : this.getOrganization().getTeams().entrySet()) {
                 TATeam team = new TATeam(entry.getKey(), entry.getValue().getId());
                 team.setGithubTeam(entry.getValue());
                 for (GHUser user : entry.getValue().listMembers().asList()) {
@@ -86,7 +188,7 @@ public class GithubManager {
     public List<TeachingAssistant> getMembers() {
         List<TeachingAssistant> teachingAssistants = new ArrayList<>();
         try {
-            for (GHUser member : this.organization.listMembers().asList()) {
+            for (GHUser member : this.getOrganization().listMembers().asList()) {
                 teachingAssistants.add(new TeachingAssistant(-1, member.getName(), member.getEmail(), member.getLogin()));
             }
         } catch (IOException e) {
@@ -104,25 +206,25 @@ public class GithubManager {
      * @throws IOException If an HTTP request failed.
      */
     public void setupAssignmentsRepo(String assignmentsRepoName, String description, String allTeachingAssistants) throws IOException {
-        GHTeam team = this.organization.getTeamByName(allTeachingAssistants);
+        GHTeam team = this.getOrganization().getTeamByName(allTeachingAssistants);
         // Check if the repository already exists.
-        GHRepository existingRepo = this.organization.getRepository(assignmentsRepoName);
+        GHRepository existingRepo = this.getOrganization().getRepository(assignmentsRepoName);
         if (existingRepo != null) {
             existingRepo.delete();
             logger.fine("Deleted pre-existing assignments repository.");
         }
 
-        this.assignmentsRepo = this.createRepository(assignmentsRepoName, team, description, false, true, true);
+        GHRepository assignmentsRepo = this.createRepository(assignmentsRepoName, team, description, false, true, true);
 
-        if (this.assignmentsRepo == null) {
+        if (assignmentsRepo == null) {
             logger.severe("Could not create assignments repository.");
             return;
         }
 
-        this.protectMasterBranch(this.assignmentsRepo, team);
+        this.protectMasterBranch(assignmentsRepo, team);
 
         // Grant all teaching assistants write access.
-        team.add(this.assignmentsRepo, GHOrganization.Permission.ADMIN);
+        team.add(assignmentsRepo, GHOrganization.Permission.ADMIN);
         logger.fine("Gave admin rights to all teaching assistants in team: " + team.getName());
     }
 
@@ -132,28 +234,30 @@ public class GithubManager {
      * @param team The student team to set up.
      * @param taTeam The team of teaching assistants that is responsible for these students.
      * @param prefix The prefix to append to the front of the repo name.
+     * @param assignmentsRepo The assignments repository.
      */
-    public void setupStudentRepo(StudentTeam team, TATeam taTeam, String prefix) {
+    public void setupStudentRepo(StudentTeam team, TATeam taTeam, String prefix, GHRepository assignmentsRepo) {
         // First check that the assignments repo exists, otherwise no invitations can be sent.
-        if (this.assignmentsRepo == null) {
+        if (assignmentsRepo == null) {
             logger.warning("Assignments repository must be created before student repositories.");
             return;
         }
 
-        GHRepository repo = this.createRepository(team.generateUniqueName(prefix), taTeam.getGithubTeam(), team.generateRepoDescription(), false, true, true);
+        GHRepository repo;
-
+        try {
-        if (repo == null) {
+            repo = this.createRepository(team.generateUniqueName(prefix), taTeam.getGithubTeam(), team.generateRepoDescription(), false, true, true);
-            logger.severe("Repository for student team " + team.getId() + " could not be created.");
+        } catch (IOException e) {
+            logger.severe("Repository for student team " + team.getNumber() + " could not be created.");
             return;
         }
 
+        team.setRepositoryName(repo.getName());
+        team.setTaTeam(taTeam);
+
         this.protectMasterBranch(repo, taTeam.getGithubTeam());
         this.createDevelopmentBranch(repo);
         this.addTATeamAsAdmin(repo, taTeam.getGithubTeam());
-        this.inviteStudentsToRepos(team, repo);
+        this.inviteStudentsToRepos(team, assignmentsRepo);
-
-        team.setRepository(repo);
-        team.setTaTeam(taTeam);
     }
 
     /**
@@ -161,17 +265,22 @@ public class GithubManager {
      * @param substring The substring which repository names should contain to be deleted.
      */
     public void deleteAllRepositories(String substring) {
-        List<GHRepository> repositories = this.organization.listRepositories().asList();
+        try {
-        for (GHRepository repo : repositories) {
+            List<GHRepository> repositories = this.getOrganization().listRepositories().asList();
-            if (repo.getName().contains(substring)) {
+            for (GHRepository repo : repositories) {
-                try {
+                if (repo.getName().contains(substring)) {
-                    repo.delete();
+                    try {
-                    logger.info("Deleted repository: " + repo.getName());
+                        repo.delete();
-                } catch (IOException e) {
+                        logger.info("Deleted repository: " + repo.getName());
-                    logger.severe("Could not delete repository: " + repo.getName());
+                    } catch (IOException e) {
-                    e.printStackTrace();
+                        logger.severe("Could not delete repository: " + repo.getName());
+                        e.printStackTrace();
+                    }
                 }
             }
+        } catch (IOException e) {
+            logger.severe("Could not get Organization for listing repositories.");
+            e.printStackTrace();
         }
     }
 
@@ -180,11 +289,16 @@ public class GithubManager {
      * @param sub Any repository containing this substring will be archived.
      */
     public void archiveAllRepositories(String sub) {
-        List<GHRepository> repositories = this.organization.listRepositories().asList();
+        try {
-        for (GHRepository repo : repositories) {
+            List<GHRepository> repositories = this.getOrganization().listRepositories().asList();
-            if (repo.getName().contains(sub)) {
+            for (GHRepository repo : repositories) {
-                archiveRepository(repo);
+                if (repo.getName().contains(sub)) {
+                    archiveRepository(repo);
+                }
             }
+        } catch (IOException e) {
+            logger.severe("Could not get Organization for listing repositories.");
+            e.printStackTrace();
         }
     }
 
@@ -216,25 +330,36 @@ public class GithubManager {
     /**
      * Invites students in a team to their repository, and the assignments repository.
      * @param team The team of students to invite as collaborators.
-     * @param repo The repository created for the students.
+     * @param assignmentsRepo The repository that contains assignments for the class.
      */
-    private void inviteStudentsToRepos(StudentTeam team, GHRepository repo) {
+    private void inviteStudentsToRepos(StudentTeam team, GHRepository assignmentsRepo) {
         try {
-            logger.finest("Adding students from team: " + team.getId() + " as collaborators.");
+            logger.finest("Adding students from team: " + team.getNumber() + " as collaborators.");
-            List<GHUser> users = new ArrayList<>();
             for (Student student : team.getStudents()) {
                 GHUser user = this.github.getUser(student.getGithubUsername());
-                users.add(user);
-            }
 
-            repo.addCollaborators(users);
+                this.addCollaboratorToRepo(user, assignmentsRepo);
-            this.assignmentsRepo.addCollaborators(users);
+                this.addCollaboratorToRepo(user, this.organization.getRepository(team.getRepositoryName()));
+            }
         } catch (IOException e) {
             logger.severe("Could not add students as collaborators to assignments or their repo.\n" + team);
             e.printStackTrace();
         }
     }
 
+    /**
+     * Adds a user to a repository, or if a failure occurs, log the failure.
+     * @param user The user to add as a collaborator.
+     * @param repository The repository to add the user to.
+     */
+    private void addCollaboratorToRepo(GHUser user, GHRepository repository) {
+        try {
+            repository.addCollaborators(user);
+        } catch (IOException e) {
+            logger.severe("Could not add user " + user.getLogin() + " to repository " + repository.getName());
+        }
+    }
+
     /**
      * Adds a teaching assistant team as admins to a particular student repository.
      * @param studentRepo The student repository.
@@ -294,25 +419,20 @@ public class GithubManager {
      * @param hasWiki Whether the repo has a wiki enabled.
      * @param hasIssues Whether the repo has issues enabled.
      * @param isPrivate Whether or not the repository is private.
-     * @return The repository that was created, or null if it could not be created.
+     * @return The repository that was created.
+     * @throws IOException If an exception occurred while sending a request.
      */
-    private GHRepository createRepository(String name, GHTeam taTeam, String description, boolean hasWiki, boolean hasIssues, boolean isPrivate){
+    private GHRepository createRepository(String name, GHTeam taTeam, String description, boolean hasWiki, boolean hasIssues, boolean isPrivate) throws IOException {
-        try {
+        GHCreateRepositoryBuilder builder = this.getOrganization().createRepository(name);
-            GHCreateRepositoryBuilder builder = this.organization.createRepository(name);
+        builder.team(taTeam);
-            builder.team(taTeam);
+        builder.wiki(hasWiki);
-            builder.wiki(hasWiki);
+        builder.issues(hasIssues);
-            builder.issues(hasIssues);
+        builder.description(description);
-            builder.description(description);
+        builder.gitignoreTemplate("Java");
-            builder.gitignoreTemplate("Java");
+        builder.private_(false); // TODO: Testing value of false. Production uses true.
-            builder.private_(isPrivate);
+        GHRepository repo = builder.create();
-            GHRepository repo = builder.create();
+        logger.fine("Created repository: " + repo.getName());
-            logger.fine("Created repository: " + repo.getName());
+        return repo;
-            return repo;
-        } catch (IOException e) {
-            logger.severe("Could not create repository: " + name);
-            e.printStackTrace();
-            return null;
-        }
     }
 
 }

src/main/java/nl/andrewlalis/model/DatabaseObject.java

@@ -1,9 +0,0 @@
-package nl.andrewlalis.model;
-
-public abstract class DatabaseObject {
-
-    public abstract DatabaseObject retrieve();
-
-    public abstract boolean store();
-
-}

src/main/java/nl/andrewlalis/model/Person.java

@@ -1,31 +1,57 @@
 package nl.andrewlalis.model;
 
+import nl.andrewlalis.model.database.BaseEntity;
+import nl.andrewlalis.ui.view.components.Detailable;
+import nl.andrewlalis.util.Pair;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Table;
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * A generic object that students, teaching assistants, and professors can extend from. This covers all the basic
  * functionality that applies to anyone in the system.
  */
-public abstract class Person  {
+@Entity(name = "Person")
+@Table(name = "persons")
+public abstract class Person extends BaseEntity implements Detailable {
 
     /**
      * The unique identification number for this person. (P- or S-Number)
      */
+    @Column(name="number", nullable = false)
     protected int number;
 
     /**
      * The person's first and last name.
      */
+    @Column(name="name", nullable = false)
     protected String name;
 
     /**
      * The person's email address.
      */
+    @Column(name="email_address", nullable = false)
     protected String emailAddress;
 
     /**
      * The person's github username.
      */
+    @Column(name="github_username", nullable = false)
     protected String githubUsername;
 
+    /**
+     * Constructs an empty default Person.
+     */
+    public Person() {
+        this.number = -1;
+        this.name = null;
+        this.emailAddress = null;
+        this.githubUsername = null;
+    }
+
     /**
      * Constructs a Person from only a github username, which is, in some cases, enough to perform a lot of actions.
      * @param githubUsername The person's github username.
@@ -58,18 +84,34 @@ public abstract class Person  {
         return this.number;
     }
 
+    public void setNumber(int number) {
+        this.number = number;
+    }
+
     public String getName(){
         return this.name;
     }
 
+    public void setName(String name) {
+        this.name = name;
+    }
+
     public String getEmailAddress(){
         return this.emailAddress;
     }
 
+    public void setEmailAddress(String emailAddress) {
+        this.emailAddress = emailAddress;
+    }
+
     public String getGithubUsername(){
         return this.githubUsername;
     }
 
+    public void setGithubUsername(String githubUsername) {
+        this.githubUsername = githubUsername;
+    }
+
     /**
      * Determines if two persons are the same. This is defined as:
      * Two persons are equal if at least one of their personal data points is identical. Because each of the data points
@@ -100,4 +142,24 @@ public abstract class Person  {
     public String toString() {
         return this.getName() + ", " + this.getNumber() + ", " + this.getEmailAddress() + ", " + this.getGithubUsername();
     }
+
+    @Override
+    public String getDetailName() {
+        return this.getName() + ", " + this.getNumber();
+    }
+
+    @Override
+    public String getDetailDescription() {
+        return null;
+    }
+
+    @Override
+    public List<Pair<String, String>> getDetailPairs() {
+        List<Pair<String, String>> pairs = new ArrayList<>();
+        pairs.add(new Pair<>("Name", this.getName()));
+        pairs.add(new Pair<>("Number", String.valueOf(this.getNumber())));
+        pairs.add(new Pair<>("Email Address", this.getEmailAddress()));
+        pairs.add(new Pair<>("Github Username", this.getGithubUsername()));
+        return pairs;
+    }
 }

src/main/java/nl/andrewlalis/model/Student.java

@@ -1,12 +1,17 @@
 package nl.andrewlalis.model;
 
+import nl.andrewlalis.util.Pair;
+
+import javax.persistence.*;
+import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
 import java.util.logging.Logger;
 
 /**
  * Represents one student's github information.
  */
+@Entity(name = "Student")
+@Table(name="students")
 public class Student extends Person {
 
     private static final Logger logger = Logger.getLogger(Student.class.getName());
@@ -17,7 +22,27 @@ public class Student extends Person {
     /**
      * A list of partners that the student has said that they would like to be partners with.
      */
-    private List<Integer> preferredPartners;
+    @ManyToMany(fetch = FetchType.EAGER)
+    @JoinTable(
+            name = "student_preferred_partners",
+            joinColumns = { @JoinColumn(name = "student_id")},
+            inverseJoinColumns = {@JoinColumn(name = "preferred_partner_id")}
+    )
+    private List<Student> preferredPartners;
+
+    /**
+     * The team that this student is assigned to.
+     */
+    @ManyToOne
+    @JoinColumn(name = "team_id")
+    private StudentTeam team;
+
+    /**
+     * Constructs an empty student object.
+     */
+    public Student() {
+        this.preferredPartners = new ArrayList<>();
+    }
 
     /**
      * Constructs a student similarly to a Person, but with an extra preferredPartners list.
@@ -28,26 +53,64 @@ public class Student extends Person {
      * @param preferredPartners A list of this student's preferred partners, as a list of integers representing the
      * other students' numbers.
      */
-    public Student(int number, String name, String emailAddress, String githubUsername, List<Integer> preferredPartners) {
+    public Student(int number, String name, String emailAddress, String githubUsername, List<Student> preferredPartners) {
         super(number, name, emailAddress, githubUsername);
         this.preferredPartners = preferredPartners;
     }
 
-    public List<Integer> getPreferredPartners() {
+    public List<Student> getPreferredPartners() {
         return this.preferredPartners;
     }
 
+    public void setPreferredPartners(List<Student> preferredPartners) {
+        this.preferredPartners = preferredPartners;
+    }
+
+    public void addPreferredPartner(Student student) {
+        this.preferredPartners.add(student);
+    }
+
     /**
-     * Using a given map of all students, returns a student's preferred team.
+     * Returns a student's preferred team, including himself.
-     * @param studentMap A mapping from student number to student for all students who have signed up.
+     * @return A team with unknown number, comprised of this student's preferred partners.
-     * @return A team with unknown id, comprised of this student's preferred partners.
      */
-    public StudentTeam getPreferredTeam(Map<Integer, Student> studentMap) {
+    public StudentTeam getPreferredTeam() {
         StudentTeam t = new StudentTeam();
-        for (int partnerNumber : this.getPreferredPartners()) {
+        for (Student partner : this.getPreferredPartners()) {
-            t.addMember(studentMap.get(partnerNumber));
+            t.addMember(partner);
         }
         t.addMember(this);
         return t;
     }
+
+    /**
+     * Assigns this student to the given team, from the student's perspective.
+     * @param team The team to set as the assigned team.
+     */
+    public void assignToTeam(StudentTeam team) {
+        this.team = team;
+    }
+
+    /**
+     * @return The team that this student is assigned to. May return null if the student is unassigned.
+     */
+    public StudentTeam getAssignedTeam() {
+        return this.team;
+    }
+
+    @Override
+    public List<Pair<String, String>> getDetailPairs() {
+        List<Pair<String, String>> pairs = super.getDetailPairs();
+        String teamNumber = "None";
+        if (this.getAssignedTeam() != null) {
+            teamNumber = String.valueOf(this.getAssignedTeam().getNumber());
+        }
+        pairs.add(new Pair<>("Team Number", teamNumber));
+
+        for (int i = 0; i < this.preferredPartners.size(); i++) {
+            pairs.add(new Pair<>("Preferred partner " + (i + 1), this.preferredPartners.get(i).getDetailName()));
+        }
+
+        return pairs;
+    }
 }

src/main/java/nl/andrewlalis/model/StudentTeam.java

@@ -1,22 +1,31 @@
 package nl.andrewlalis.model;
 
-import org.kohsuke.github.GHRepository;
+import nl.andrewlalis.util.Pair;
 
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
 import java.util.Arrays;
+import java.util.List;
 
 /**
  * Represents one or more students' collective information.
  */
-public class StudentTeam extends Team{
+@Entity(name = "StudentTeam")
+@Table(name = "student_teams")
+public class StudentTeam extends Team {
 
     /**
      * The repository belonging to this team.
      */
-    private GHRepository repository;
+    @Column(name = "repository_name", unique = true)
+    private String repositoryName;
 
     /**
      * The TATeam responsible for this student team.
      */
+    @ManyToOne
     private TATeam taTeam;
 
     public StudentTeam() {
@@ -46,7 +55,7 @@ public class StudentTeam extends Team{
                 // If the student doesn't have an preferred partners, then assume that this is valid.
                 if (!studentA.getPreferredPartners().isEmpty()) {
                     for (Student studentB : this.getStudents()) {
-                        if (!studentA.equals(studentB) && !studentA.getPreferredPartners().contains(studentB.getNumber())) {
+                        if (!studentA.equals(studentB) && !studentA.getPreferredPartners().contains(studentB)) {
                             return false;
                         }
                     }
@@ -62,11 +71,11 @@ public class StudentTeam extends Team{
      * Generates a unique name which is intended to be used for the repository name of this team.
      * @param prefix A prefix to further reduce the chances of duplicate names.
      *               It is suggested to use something like "2018_OOP"
-     * @return A string comprised of the prefix, team id, and student number of each team member.
+     * @return A string comprised of the prefix, team number, and student number of each team member.
      */
     public String generateUniqueName(String prefix) {
         StringBuilder sb = new StringBuilder(prefix);
-        sb.append("_team_").append(this.id);
+        sb.append("_team_").append(this.number);
         for (Student s : this.getStudents()) {
             sb.append('_').append(s.getNumber());
         }
@@ -79,7 +88,7 @@ public class StudentTeam extends Team{
      */
     public String generateRepoDescription() {
         StringBuilder sb = new StringBuilder();
-        sb.append("Group ").append(this.id).append(": ");
+        sb.append("Group ").append(this.number).append(": ");
         for (int i = 0; i < this.memberCount(); i++) {
             sb.append(this.getStudents()[i].getName());
             if (i != this.memberCount()-1) {
@@ -89,12 +98,12 @@ public class StudentTeam extends Team{
         return sb.toString();
     }
 
-    public GHRepository getRepository() {
+    public String getRepositoryName() {
-        return this.repository;
+        return this.repositoryName;
     }
 
-    public void setRepository(GHRepository repo) {
+    public void setRepositoryName(String repositoryName) {
-        this.repository = repo;
+        this.repositoryName = repositoryName;
     }
 
     public TATeam getTaTeam() {
@@ -104,4 +113,22 @@ public class StudentTeam extends Team{
     public void setTaTeam(TATeam team) {
         this.taTeam = team;
     }
+
+    @Override
+    public String getDetailName() {
+        return this.generateRepoDescription();
+    }
+
+    @Override
+    public List<Pair<String, String>> getDetailPairs() {
+        List<Pair<String, String>> pairs = super.getDetailPairs();
+        pairs.add(new Pair<>("Repository Name", this.getRepositoryName()));
+        String taTeamName = "None";
+        if (this.getTaTeam() != null) {
+            taTeamName = this.getTaTeam().getDetailName();
+        }
+        pairs.add(new Pair<>("TA Team", taTeamName));
+
+        return pairs;
+    }
 }

src/main/java/nl/andrewlalis/model/TATeam.java

@@ -2,14 +2,19 @@ package nl.andrewlalis.model;
 
 import org.kohsuke.github.GHTeam;
 
+import javax.persistence.Entity;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+import javax.persistence.Transient;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 /**
- * Represents a teaching assistant team, which is itself a 'team' in the organization. This class is used for parsing
+ * Represents a teaching assistant team, which is itself a 'team' in the organization.
- * json from requests to github to get a list of all teams in the organization.
  */
+@Entity(name = "TATeam")
+@Table(name = "ta_teams")
 public class TATeam extends Team {
 
     /**
@@ -20,11 +25,13 @@ public class TATeam extends Team {
     /**
      * The Github team associated with this team.
      */
+    @Transient
     private GHTeam githubTeam;
 
     /**
      * A list of all student teams for which this TA team is responsible.
      */
+    @OneToMany
     private List<StudentTeam> studentTeams;
 
     /**

src/main/java/nl/andrewlalis/model/TeachingAssistant.java

@@ -1,8 +1,13 @@
 package nl.andrewlalis.model;
 
+import javax.persistence.Entity;
+import javax.persistence.Table;
+
 /**
  * Represents an administrator in the organization, who manages student teams.
  */
+@Entity(name = "TeachingAssistant")
+@Table(name = "teaching_assistants")
 public class TeachingAssistant extends Person {
 
     /**

src/main/java/nl/andrewlalis/model/Team.java

@@ -1,5 +1,10 @@
 package nl.andrewlalis.model;
 
+import nl.andrewlalis.model.database.BaseEntity;
+import nl.andrewlalis.ui.view.components.Detailable;
+import nl.andrewlalis.util.Pair;
+
+import javax.persistence.*;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -8,39 +13,55 @@ import java.util.List;
  * An abstract Team object from which both Teaching Assistant and Student teams can be built. A Team consists of a list
  * of members, and a unique identification number.
  */
-public abstract class Team {
+@Entity(name = "Team")
+@Table(name = "teams")
+public abstract class Team extends BaseEntity implements Detailable {
 
     /**
      * An identification number unique to this team alone.
      */
-    protected int id;
+    @Column(name = "number")
+    protected int number;
 
     /**
      * A list of members of this team.
      */
+    @OneToMany(fetch = FetchType.EAGER)
+    @JoinTable(
+            name = "team_members",
+            joinColumns = {@JoinColumn(name = "team_id")},
+            inverseJoinColumns = {@JoinColumn(name = "person_id")}
+    )
     private List<Person> members;
 
     /**
-     * Constructs this team with the given id.
+     * Constructs this team with the given number.
-     * @param id The id to assign to this team.
+     * @param number The number to assign to this team.
      */
-    public Team(int id) {
+    public Team(int number) {
-        this.id = id;
+        this.number = number;
         this.members = new ArrayList<>();
     }
 
     /**
-     * @param newId The new id number to assign to this team.
+     * Constructs an empty team with a default id of -1.
      */
-    public void setId(int newId) {
+    protected Team() {
-        this.id = newId;
+        this(-1);
     }
 
     /**
-     * @return This team's id number.
+     * @param newId The new number number to assign to this team.
      */
-    public int getId() {
+    public void setNumber(int newId) {
-        return this.id;
+        this.number = newId;
+    }
+
+    /**
+     * @return This team's number number.
+     */
+    public int getNumber() {
+        return this.number;
     }
 
     /**
@@ -123,7 +144,7 @@ public abstract class Team {
 
     /**
      * Checks if an object is equal to this team. First checks if the other object is a Team, and then if it has the
-     * same id and team size. If both of those conditions are met, then it will check that all team members are the
+     * same number and team size. If both of those conditions are met, then it will check that all team members are the
      * same.
      * @param obj The object to check for equality.
      * @return True if the two objects represent the same team, or false otherwise.
@@ -132,7 +153,7 @@ public abstract class Team {
     public boolean equals(Object obj) {
         if (obj instanceof Team) {
             Team team = (Team) obj;
-            return team.getId() == this.getId() && this.hasSameMembers(team);
+            return team.getNumber() == this.getNumber() && this.hasSameMembers(team);
         }
         return false;
     }
@@ -143,11 +164,32 @@ public abstract class Team {
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();
-        sb.append("Team of ").append(this.memberCount()).append(" members:\tID: ").append(this.id).append('\n');
+        sb.append("Team of ").append(this.memberCount()).append(" members:\tID: ").append(this.number).append('\n');
         for (Person person : this.members) {
             sb.append(person.toString()).append('\n');
         }
         return sb.toString();
     }
 
+    @Override
+    public String getDetailName() {
+        return String.valueOf(this.getNumber());
+    }
+
+    @Override
+    public String getDetailDescription() {
+        return null;
+    }
+
+    @Override
+    public List<Pair<String, String>> getDetailPairs() {
+        List<Pair<String, String>> pairs = new ArrayList<>();
+        pairs.add(new Pair<>("Number", this.getDetailName()));
+
+        for (int i = 0; i < this.memberCount(); i++) {
+            pairs.add(new Pair<>("Member " + (i + 1), this.members.get(i).getDetailName()));
+        }
+
+        return pairs;
+    }
 }

src/main/java/nl/andrewlalis/model/database/BaseEntity.java

@@ -0,0 +1,28 @@
+package nl.andrewlalis.model.database;
+
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+
+/**
+ * Defines a base entity which all others in the database extend from.
+ */
+@MappedSuperclass
+public abstract class BaseEntity {
+
+    /**
+     * The number for this entity.
+     */
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+}

src/main/java/nl/andrewlalis/model/database/Database.java

@@ -1,266 +0,0 @@
-package nl.andrewlalis.model.database;
-
-import nl.andrewlalis.model.*;
-
-import java.sql.*;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.logging.Logger;
-
-/**
- * This class abstracts many of the functions needed for interaction with the application's SQLite database.
- */
-public class Database {
-
-    private static final int PERSON_TYPE_STUDENT = 0;
-    private static final int PERSON_TYPE_TA = 1;
-
-    private static final int TEAM_TYPE_STUDENT = 0;
-    private static final int TEAM_TYPE_TA = 1;
-    private static final int TEAM_TYPE_TA_ALL = 2;
-
-    private static final int TEAM_NONE = 1000000;
-    private static final int TEAM_TA_ALL = 1000001;
-
-    private static final int ERROR_TYPE_TEAM = 0;
-    private static final int ERROR_TYPE_PERSON = 1;
-    private static final int ERROR_TYPE_SYSTEM = 2;
-
-    /**
-     * The connection needed for all queries.
-     */
-    private Connection connection;
-
-    /**
-     * The logger for outputting debug info.
-     */
-    private static final Logger logger = Logger.getLogger(Database.class.getName());
-    static {
-        logger.setParent(Logger.getGlobal());
-    }
-
-    public Database(String databaseFilename) {
-        try {
-            this.connection = DriverManager.getConnection("jdbc:sqlite:" + databaseFilename);
-        } catch (SQLException e) {
-            e.printStackTrace();
-        }
-    }
-
-    /**
-     * Initializes the database from the table_init.sql script, which defines the table schema.
-     * Then, inserts some constant starter data from /sql/insert/types.sql.
-     * @return True if successful, false if not.
-     */
-    public boolean initialize() {
-        List<PreparedStatement> tableStatements = Utils.prepareStatementsFromFile("/sql/table_init.sql", this.connection);
-        for (PreparedStatement statement : tableStatements) {
-            try {
-                statement.execute();
-            } catch (SQLException e) {
-                logger.severe("SQLException while executing prepared statement:\n" + statement.toString() + "\nCode: " + e.getErrorCode());
-                return false;
-            }
-        }
-        logger.fine("Database tables initialized.");
-        List<PreparedStatement> insertStatements = Utils.prepareStatementsFromFile("/sql/insert/types.sql", this.connection);
-        for (PreparedStatement statement : insertStatements) {
-            try {
-                statement.execute();
-            } catch (SQLException e) {
-                logger.severe("SQLException while inserting into table:\n" + statement.toString() + "\nCode: " + e.getErrorCode());
-                return false;
-            }
-        }
-        logger.fine("Initial types inserted.");
-        return true;
-    }
-
-    /**
-     * Stores a person in the database.
-     * @param person The person object to store.
-     * @param personType The type of person to store, using a constant defined above.
-     * @return True if successful, false otherwise.
-     */
-    public boolean insertPerson(Person person, int personType) {
-        try {
-            logger.finest("Storing person: " + person);
-            String sql = "INSERT INTO persons (id, name, email_address, github_username, person_type_id) VALUES (?, ?, ?, ?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, person.getNumber());
-            stmt.setString(2, person.getName());
-            stmt.setString(3, person.getEmailAddress());
-            stmt.setString(4, person.getGithubUsername());
-            stmt.setInt(5, personType);
-            return stmt.execute();
-        } catch (SQLException e) {
-            logger.severe("SQLException while inserting Person: " + person + '\n' + e.getMessage());
-            return false;
-        }
-    }
-
-    /**
-     * Stores a student in the database.
-     * @param student The student to store.
-     * @return True if the operation was successful, false otherwise.
-     */
-    public boolean insertStudent(Student student) {
-        logger.finest("Storing student: " + student);
-        if (!insertPerson(student, PERSON_TYPE_STUDENT)) {
-            return false;
-        }
-        try {
-            String sql = "INSERT INTO students (person_id, chose_partner) VALUES (?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, student.getNumber());
-            stmt.setInt(2, student.getPreferredPartners().size() > 0 ? 1 : 0);
-            if (!stmt.execute()) {
-                return false;
-            }
-            // Storing partners.
-            String sqlPartner = "INSERT INTO student_preferred_partners (student_id, partner_id) VALUES (?, ?);";
-            PreparedStatement stmtPartner = this.connection.prepareStatement(sqlPartner);
-            for (int partnerId : student.getPreferredPartners()) {
-                stmtPartner.setInt(1, student.getNumber());
-                stmtPartner.setInt(2, partnerId);
-                stmtPartner.execute();
-            }
-            return true;
-        } catch (SQLException e) {
-            logger.severe("SQL Exception while inserting Student into database.\n" + e.getMessage());
-            e.printStackTrace();
-            return false;
-        }
-    }
-
-    /**
-     * Stores a teaching assistant in the database.
-     * @param ta The teaching assistant to store.
-     * @return True if successful, false otherwise.
-     */
-    public boolean insertTeachingAssistant(TeachingAssistant ta) {
-        if (!insertPerson(ta, PERSON_TYPE_TA)) {
-            return false;
-        }
-        try {
-            String sql = "INSERT INTO teaching_assistants (person_id) VALUES (?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, ta.getNumber());
-            stmt.execute();
-            return true;
-        } catch (SQLException e) {
-            logger.severe("SQL Exception while inserting TeachingAssistant.\n" + e.getMessage());
-            e.printStackTrace();
-            return false;
-        }
-    }
-
-    /**
-     * Stores a team in the database, and any persons who do not yet exist.
-     * @param team The team to store.
-     * @param type The type of team that this is.
-     * @param personType The type of people that this team is made of.
-     * @return True if successful, false otherwise.
-     */
-    public boolean insertTeam(Team team, int type, int personType) {
-        try {
-            String sql = "INSERT INTO teams (id, team_type_id) VALUES (?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, team.getId());
-            stmt.setInt(2, type);
-            if (stmt.execute()) {
-                for (Person p : team.getMembers()) {
-                    this.insertPerson(p, personType);
-                    String sqlMembers = "INSERT INTO team_members (team_id, person_id) VALUES (?, ?);";
-                    PreparedStatement stmtMembers = this.connection.prepareStatement(sqlMembers);
-                    stmtMembers.setInt(1, team.getId());
-                    stmtMembers.setInt(2, p.getNumber());
-                    stmtMembers.execute();
-                }
-            }
-            return true;
-        } catch (SQLException e) {
-            logger.severe("SQLException while inserting team: " + team + '\n' + e.getMessage());
-            return false;
-        }
-    }
-
-    /**
-     * Stores a student team in the database.
-     * @param team The team to store.
-     * @return True if successful, false otherwise.
-     */
-    public boolean insertStudentTeam(StudentTeam team) {
-        if (!this.insertTeam(team, TEAM_TYPE_STUDENT, PERSON_TYPE_STUDENT)) {
-            return false;
-        }
-        try {
-            String sql = "INSERT INTO student_teams (team_id, repository_name, teaching_assistant_team_id) VALUES (?, ?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, team.getId());
-            stmt.setString(2, (team.getRepository() == null) ? null : team.getRepository().getName());
-            stmt.setInt(3, (team.getTaTeam() == null) ? TEAM_NONE : team.getTaTeam().getId());
-            return stmt.execute();
-        } catch (SQLException e) {
-            logger.severe("SQLException while inserting student team: " + team + '\n' + e.getMessage());
-            e.printStackTrace();
-            return false;
-        }
-    }
-
-    /**
-     * Stores a list of student teams in the database.
-     * @param teams The list of teams to store.
-     * @return True if successful, or false if an error occurred.
-     */
-    public boolean storeStudentTeams(List<StudentTeam> teams) {
-        for (StudentTeam team : teams) {
-            this.insertStudentTeam(team);
-        }
-        return true;
-    }
-
-    /**
-     * Retrieves a list of preferred partners that each student has set.
-     * @param studentId The student id to search by.
-     * @return A list of student id's for all students that the given student wishes to be their partner.
-     */
-    private List<Integer> retrievePreferredPartners(int studentId) {
-        try {
-            logger.finest("Retrieving preferred partners of student: " + studentId);
-            String sql = "SELECT partner_id FROM student_preferred_partners WHERE student_id=?;";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, studentId);
-            ResultSet results = stmt.executeQuery();
-            List<Integer> partners = new ArrayList<>();
-            while (results.next()) {
-                partners.add(results.getInt(1));
-            }
-            return partners;
-        } catch (SQLException e) {
-            logger.severe("SQL Exception while retrieving preferred partners of student: " + studentId + '\n' + e.getMessage());
-            e.printStackTrace();
-            return new ArrayList<>();
-        }
-    }
-
-    /**
-     * Retrieves a student by their id.
-     * @param id The id of the student (student number)
-     * @return The student corresponding to this number, or null if it could not be found.
-     */
-    public Student retrieveStudent(int id) {
-        try {
-            String sql = "SELECT * FROM persons WHERE id=?";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, id);
-            ResultSet result = stmt.executeQuery();
-            return new Student(id, result.getString("name"), result.getString("email_address"), result.getString("github_username"), this.retrievePreferredPartners(id));
-        } catch (SQLException e) {
-            logger.severe("SQL Exception while retrieving Student.\n" + e.getMessage());
-            e.printStackTrace();
-            return null;
-        }
-    }
-
-}

src/main/java/nl/andrewlalis/model/database/DbHelper.java

@@ -0,0 +1,56 @@
+package nl.andrewlalis.model.database;
+
+import nl.andrewlalis.model.Student;
+import nl.andrewlalis.model.StudentTeam;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+
+import java.util.List;
+
+/**
+ * This class will contain some static methods to help in the retrieval of commonly used information.
+ */
+@SuppressWarnings("unchecked")
+public class DbHelper {
+
+    /**
+     * Gets a list of students in the database.
+     * @return A list of students.
+     */
+    public static List<Student> getStudents() {
+        Session session = DbUtil.getSessionFactory().openSession();
+        List<Student> students = (List<Student>) session.createQuery("from Student").list();
+        session.close();
+        return students;
+    }
+
+    /**
+     * Saves a list of student teams to the database.
+     */
+    public static void saveStudentTeams(List<StudentTeam> teams) {
+        Session session = DbUtil.getSessionFactory().openSession();
+        Transaction tx = session.beginTransaction();
+
+        for (StudentTeam team : teams) {
+            for (Student s : team.getStudents()) {
+                session.save(s);
+            }
+            session.save(team);
+        }
+
+        tx.commit();
+        session.close();
+    }
+
+    /**
+     * Gets a list of student teams in the database.
+     * @return A list of student teams.
+     */
+    public static List<StudentTeam> getStudentTeams() {
+        Session session = DbUtil.getSessionFactory().openSession();
+        List<StudentTeam> studentTeams = (List<StudentTeam>) session.createQuery("from StudentTeam").list();
+        session.close();
+        return studentTeams;
+    }
+
+}

src/main/java/nl/andrewlalis/model/database/DbUtil.java

@@ -0,0 +1,51 @@
+package nl.andrewlalis.model.database;
+
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+
+/**
+ * A utility class for easier interaction with the Hibernate database.
+ */
+public class DbUtil {
+
+    private static SessionFactory sessionFactory;
+
+    /**
+     * Set up the session factory based on hibernate.cfg.xml.
+     */
+    private static void setUp() {
+        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+                .configure()
+                .build();
+        try {
+            sessionFactory = new MetadataSources(registry)
+                    .buildMetadata()
+                    .buildSessionFactory();
+        } catch (Exception e) {
+            e.printStackTrace();
+            StandardServiceRegistryBuilder.destroy(registry);
+        }
+    }
+
+    /**
+     * Close the session factory when it's no longer needed.
+     */
+    public static void tearDown() {
+        if (sessionFactory != null) {
+            sessionFactory.close();
+        }
+    }
+
+    /**
+     * Gets the session factory so that sessions can be made.
+     * @return The session factory.
+     */
+    public static SessionFactory getSessionFactory() {
+        if (sessionFactory == null) {
+            setUp();
+        }
+        return sessionFactory;
+    }
+}

src/main/java/nl/andrewlalis/model/database/Utils.java

@@ -1,52 +0,0 @@
-package nl.andrewlalis.model.database;
-
-import nl.andrewlalis.util.FileUtils;
-
-import java.sql.Connection;
-import java.sql.PreparedStatement;
-import java.sql.SQLException;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.logging.Logger;
-
-/**
- * Contains some methods which make database actions much easier.
- */
-public class Utils {
-
-    /**
-     * The logger for outputting debug info.
-     */
-    private static final Logger logger = Logger.getLogger(Utils.class.getName());
-    static {
-        logger.setParent(Logger.getGlobal());
-    }
-
-    /**
-     * Gets an ordered list of prepared statements from a file which contains multiple statements separated by a
-     * semicolon. This method separates those statements into their own strings, and prepares them individually to be
-     * executed later.
-     * @param filename The name of the file which contains the statements.
-     * @param connection The connection to a database; used to prepare statements.
-     * @return An ordered list of prepared statements which are based on the contents of the file provided.
-     */
-    public static List<PreparedStatement> prepareStatementsFromFile(String filename, Connection connection) {
-        String string = FileUtils.readStringFromFile(filename);
-        if (string == null || string.isEmpty()) {
-            return new ArrayList<>();
-        }
-        String[] splits = string.split(";");
-        List<PreparedStatement> statements = new ArrayList<>();
-        for (String split : splits) {
-            if (split.trim().length() > 1) {
-                try {
-                    statements.add(connection.prepareStatement(split));
-                } catch (SQLException e) {
-                    logger.severe("SQLException while preparing a statement:\n" + split + "\nError Code: " + e.getErrorCode() + '\n' + e.getMessage());
-                }
-            }
-        }
-        return statements;
-    }
-
-}

src/main/java/nl/andrewlalis/ui/control/listeners/ArchiveAllListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import javax.swing.*;

src/main/java/nl/andrewlalis/ui/control/listeners/CommandFieldKeyListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 
 import javax.swing.*;
 import java.awt.event.KeyEvent;

src/main/java/nl/andrewlalis/ui/control/listeners/DefineTaTeamsListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import java.awt.event.ActionEvent;

src/main/java/nl/andrewlalis/ui/control/listeners/DelegateStudentTeamsListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import java.awt.event.ActionEvent;

src/main/java/nl/andrewlalis/ui/control/listeners/DeleteReposListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import javax.swing.*;

src/main/java/nl/andrewlalis/ui/control/listeners/ExecutableListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import java.awt.event.ActionListener;

src/main/java/nl/andrewlalis/ui/control/listeners/GenerateAssignmentsRepoListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import javax.swing.*;

src/main/java/nl/andrewlalis/ui/control/listeners/ReadStudentsFileListener.java

@@ -1,6 +1,6 @@
 package nl.andrewlalis.ui.control.listeners;
 
-import nl.andrewlalis.ui.control.command.CommandExecutor;
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.ui.view.InitializerApp;
 
 import javax.swing.*;

src/main/java/nl/andrewlalis/ui/control/listeners/ViewChangeListener.java

@@ -0,0 +1,68 @@
+package nl.andrewlalis.ui.control.listeners;
+
+import nl.andrewlalis.ui.view.AbstractView;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+/**
+ * The ViewChangeListener is attached to buttons which should change the view to a new view. With this listener, one
+ * needs to simply give the previous view, and the next view, and
+ */
+public class ViewChangeListener implements ActionListener {
+
+    protected AbstractView previousView;
+    protected AbstractView newView;
+
+    public ViewChangeListener(AbstractView previousView, AbstractView newView) {
+        this.previousView = previousView;
+        this.newView = newView;
+        this.newView.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent windowEvent) {
+                back();
+            }
+        });
+    }
+
+    /**
+     * This method is called just before the view is changed.
+     * @return True if the change should happen, or false if some validation or check prevents the user from moving to
+     * the next view.
+     */
+    protected boolean beforeChange() {
+        // Child classes can implement extra behavior here.
+        return true;
+    }
+
+    /**
+     * Defines some default behavior for switching to a new view.
+     * @param actionEvent The event which triggered this action.
+     */
+    @Override
+    public void actionPerformed(ActionEvent actionEvent) {
+        if (this.beforeChange()) {
+            this.forward();
+        }
+    }
+
+    /**
+     * Goes to the new view, and hides the previous view.
+     */
+    private void forward() {
+        this.previousView.setVisible(false);
+        this.newView.reset();
+        this.newView.setVisible(true);
+    }
+
+    /**
+     * Goes 'back in time', or rather, hides the current view and moves back to the one which sent us here.
+     */
+    private void back() {
+        this.previousView.reset();
+        this.previousView.setVisible(true);
+        this.newView.setVisible(false);
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/create_assignments_view/NextListener.java

@@ -0,0 +1,70 @@
+package nl.andrewlalis.ui.control.listeners.create_assignments_view;
+
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.ui.control.listeners.ViewChangeListener;
+import nl.andrewlalis.ui.view.AbstractView;
+import nl.andrewlalis.ui.view.CreateAssignmentsView;
+
+import javax.swing.*;
+import java.io.IOException;
+
+/**
+ * Listens for when the user clicks 'next' in the CreateAssignmentsView. This listener is responsible for checking that
+ * the user enters a correct repository name, or if not, asks if the user wishes to create the repository with that
+ * name.
+ */
+public class NextListener extends ViewChangeListener {
+
+    public NextListener(AbstractView previousView, AbstractView newView) {
+        super(previousView, newView);
+    }
+
+    /**
+     * Validate that the repository the user has entered exists in the organization.
+     * @return True if the repository exists, or if the user creates a repository with that name, or false if an
+     * Assignments repository was not created.
+     */
+    @Override
+    protected boolean beforeChange() {
+        CreateAssignmentsView assignmentsView = (CreateAssignmentsView) this.previousView;
+        String repoName = assignmentsView.getRepositoryName();
+
+        // Check that the repository name is legitimate.
+        if (repoName.trim().length() == 0) {
+            JOptionPane.showMessageDialog(this.previousView, "Repository name is empty.", "Error", JOptionPane.WARNING_MESSAGE);
+            return false;
+        }
+
+        // Check if the repository already exists.
+        GithubManager manager = assignmentsView.getGithubManager();
+        if (manager.repoExists(repoName)) {
+            return true;
+        } else {
+            // If not, we have to create it here.
+            int reply = JOptionPane.showConfirmDialog(
+                    assignmentsView,
+                    "The repository you gave does not exist.\nWould you like to create it?",
+                    "Create new repository?",
+                    JOptionPane.YES_NO_OPTION);
+            if (reply == JOptionPane.YES_OPTION) {
+                try {
+                    String description = JOptionPane.showInputDialog(assignmentsView, "Enter a description for the repository.", "Assignments Repository Description", JOptionPane.QUESTION_MESSAGE);
+                    assignmentsView.getGithubManager().setupAssignmentsRepo(repoName, description, this.getTeachingAssistantsTeamName());
+                    return true;
+                } catch (IOException e) {
+                    //e.printStackTrace();
+                    JOptionPane.showMessageDialog(assignmentsView, "Could not create repository:\n" + e.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        }
+    }
+
+    // TODO: Replace this with a selector for an existing team of teaching assistants. Or configure this afterwards.
+    private String getTeachingAssistantsTeamName() {
+        String name = JOptionPane.showInputDialog(this.previousView, "Please enter (exactly) the name of Github team\nthat contains all teaching assistants.", "Select TA Team", JOptionPane.QUESTION_MESSAGE);
+        return name;
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/input_students_file_view/DoneListener.java

@@ -0,0 +1,15 @@
+package nl.andrewlalis.ui.control.listeners.input_students_file_view;
+
+import nl.andrewlalis.ui.control.listeners.ViewChangeListener;
+import nl.andrewlalis.ui.view.AbstractView;
+
+/**
+ * Listens for when the user clicks 'Done' after selecting a file to input.
+ */
+public class DoneListener extends ViewChangeListener {
+
+    public DoneListener(AbstractView previousView, AbstractView newView) {
+        super(previousView, newView);
+    }
+
+}

src/main/java/nl/andrewlalis/ui/control/listeners/input_students_file_view/FileSelectListener.java

@@ -0,0 +1,63 @@
+package nl.andrewlalis.ui.control.listeners.input_students_file_view;
+
+import nl.andrewlalis.Main;
+import nl.andrewlalis.model.StudentTeam;
+import nl.andrewlalis.model.database.DbHelper;
+import nl.andrewlalis.ui.view.InputStudentsFileView;
+import nl.andrewlalis.util.TeamGenerator;
+
+import javax.swing.*;
+import javax.swing.filechooser.FileFilter;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * Listens for when the user selects a CSV file to use to populate the teams list.
+ */
+public class FileSelectListener implements ActionListener {
+
+    private InputStudentsFileView fileView;
+
+    public FileSelectListener(InputStudentsFileView parent) {
+        this.fileView = parent;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent actionEvent) {
+        // First check if the user has entered a valid team size.
+        if (this.fileView.getStudentsPerTeam() < 1) {
+            JOptionPane.showMessageDialog(this.fileView, "Invalid or missing team size.", "Error", JOptionPane.WARNING_MESSAGE);
+            return;
+        }
+
+        // It is assumed that the team size is valid, so the user can choose a file.
+        JFileChooser chooser = new JFileChooser();
+        chooser.setAcceptAllFileFilterUsed(false);
+        chooser.addChoosableFileFilter(new FileFilter() {
+            @Override
+            public boolean accept(File file) {
+                return file.isDirectory() || file.getName().toLowerCase().endsWith(".csv");
+            }
+
+            @Override
+            public String getDescription() {
+                return "CSV Files (*.csv)";
+            }
+        });
+        int fileResponse = chooser.showOpenDialog(this.fileView);
+
+        if (fileResponse == JFileChooser.APPROVE_OPTION) {
+            int teamSize = this.fileView.getStudentsPerTeam();
+            try {
+                List<StudentTeam> teams = TeamGenerator.generateFromCSV(chooser.getSelectedFile().getAbsolutePath(), teamSize);
+                DbHelper.saveStudentTeams(teams);
+                Main.getManagementView().updateModels();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/management_view/PopupSelector.java

@@ -0,0 +1,42 @@
+package nl.andrewlalis.ui.control.listeners.management_view;
+
+import javax.swing.*;
+import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
+import java.awt.*;
+
+/**
+ * This listener, when added to a JPopupMenu, will select the clicked row when a user right-clicks on the table.
+ */
+public class PopupSelector implements PopupMenuListener {
+
+    /**
+     * The table on which to select rows.
+     */
+    private JTable table;
+
+    public PopupSelector(JTable table) {
+        this.table = table;
+    }
+
+    @Override
+    public void popupMenuWillBecomeVisible(PopupMenuEvent popupMenuEvent) {
+        JPopupMenu popupMenu = (JPopupMenu) popupMenuEvent.getSource();
+        SwingUtilities.invokeLater(() -> {
+            int rowAtPoint = table.rowAtPoint(SwingUtilities.convertPoint(popupMenu, new Point(0, 0), table));
+            if (rowAtPoint > -1) {
+                table.setRowSelectionInterval(rowAtPoint, rowAtPoint);
+            }
+        });
+    }
+
+    @Override
+    public void popupMenuWillBecomeInvisible(PopupMenuEvent popupMenuEvent) {
+
+    }
+
+    @Override
+    public void popupMenuCanceled(PopupMenuEvent popupMenuEvent) {
+
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/management_view/TableRowListener.java

@@ -0,0 +1,39 @@
+package nl.andrewlalis.ui.control.listeners.management_view;
+
+import javax.swing.*;
+import java.awt.event.ActionListener;
+
+/**
+ * This abstract class defines listeners which listen to tables, that is, a table row is clicked on in the table, and
+ * that is passed to children.
+ */
+public abstract class TableRowListener implements ActionListener {
+
+    /**
+     * The table of which to get the row.
+     */
+    private JTable table;
+
+    /**
+     * Constructs a table row listener.
+     * @param table The table on which to get selected rows.
+     */
+    public TableRowListener(JTable table) {
+        this.table = table;
+    }
+
+    /**
+     * @return The selected row.
+     */
+    protected final int getSelectedRow() {
+        return this.table.getSelectedRow();
+    }
+
+    /**
+     * @return The table that this listener is attached to.
+     */
+    protected final JTable getTable() {
+        return this.table;
+    }
+
+}

src/main/java/nl/andrewlalis/ui/control/listeners/management_view/student_actions/RemoveFromCourseListener.java

@@ -0,0 +1,28 @@
+package nl.andrewlalis.ui.control.listeners.management_view.student_actions;
+
+import nl.andrewlalis.ui.control.listeners.management_view.TableRowListener;
+import nl.andrewlalis.ui.view.table_models.StudentTableModel;
+
+import javax.swing.*;
+import java.awt.event.ActionEvent;
+
+/**
+ * Listens for when the user intends to remove a selected student from the course entirely. This entails a few things:
+ * 1. Remove them from any team they are in.
+ * 2. Archive any repository that is empty as a result of removing them.
+ * 3. Remove the student from the list of students.
+ *      (This should not actually remove the record, just set it as removed.)
+ */
+public class RemoveFromCourseListener extends TableRowListener {
+
+    public RemoveFromCourseListener(JTable table) {
+        super(table);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent actionEvent) {
+        StudentTableModel model = (StudentTableModel) this.getTable().getModel();
+
+        System.out.println(model.getStudentAt(this.getSelectedRow()));
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/management_view/student_actions/SetTeamListener.java

@@ -0,0 +1,31 @@
+package nl.andrewlalis.ui.control.listeners.management_view.student_actions;
+
+import nl.andrewlalis.model.Student;
+import nl.andrewlalis.model.StudentTeam;
+import nl.andrewlalis.ui.control.listeners.management_view.TableRowListener;
+import nl.andrewlalis.ui.view.dialogs.TeamChooserDialog;
+import nl.andrewlalis.ui.view.table_models.StudentTableModel;
+
+import javax.swing.*;
+import java.awt.event.ActionEvent;
+
+/**
+ * Listens for when the user wishes to set the team of a certain student. This should do the following:
+ * 1. User selects team to set student to, or chooses to create a new team.
+ * 2. StudentTeam object is created or modified.
+ * 3. The repository is updated automatically.
+ */
+public class SetTeamListener extends TableRowListener {
+
+    public SetTeamListener(JTable table) {
+        super(table);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent actionEvent) {
+        StudentTableModel model = (StudentTableModel) this.getTable().getModel();
+        Student student = model.getStudentAt(this.getSelectedRow());
+
+        StudentTeam chosenTeam = (StudentTeam) new TeamChooserDialog(SwingUtilities.getWindowAncestor(this.getTable())).getSelectedTeam();
+    }
+}

src/main/java/nl/andrewlalis/ui/control/listeners/start_view/CreateAssignmentsRepoListener.java

@@ -0,0 +1,27 @@
+package nl.andrewlalis.ui.control.listeners.start_view;
+
+import nl.andrewlalis.ui.control.listeners.ViewChangeListener;
+import nl.andrewlalis.ui.view.AbstractView;
+import nl.andrewlalis.ui.view.StartView;
+
+/**
+ * Listener for when the user intends to create repositories for a new course.
+ */
+public class CreateAssignmentsRepoListener extends ViewChangeListener {
+
+    public CreateAssignmentsRepoListener(AbstractView previousView, AbstractView newView) {
+        super(previousView, newView);
+    }
+
+    /**
+     * All that needs to be done here is check that the github manager can work with the given info.
+     * @return True if the github manager accepts the organization name and access token, false otherwise.
+     */
+    @Override
+    protected boolean beforeChange() {
+        StartView startView = (StartView) this.previousView;
+        startView.getGithubManager().setOrganizationName(startView.getOrganizationName());
+        startView.getGithubManager().setAccessToken(startView.getAccessToken());
+        return startView.getGithubManager().validate();
+    }
+}

src/main/java/nl/andrewlalis/ui/view/AbstractView.java

@@ -0,0 +1,140 @@
+package nl.andrewlalis.ui.view;
+
+import nl.andrewlalis.git_api.GithubManager;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * All views in the application will extend from this view, as a means of simplifying and organizing how visual
+ * components are made.
+ */
+public abstract class AbstractView extends JFrame {
+
+    /**
+     * A GithubManager object which can be used to interact with github.
+     */
+    private GithubManager githubManager;
+
+    /**
+     * A list of views which are linked to this one via buttons in the component pane.
+     */
+    private List<AbstractView> childViews;
+
+    /**
+     * A list of views which lead to this one.
+     */
+    private List<AbstractView> parentViews;
+
+    /**
+     * The image icon for all abstract views.
+     */
+    private static final ImageIcon imageIcon = new ImageIcon(AbstractView.class.getResource("/image/icon.png"));
+
+    /**
+     * Initializes the view by packing the content pane as it is defined by any child, and setting some generic swing
+     * values.
+     * @param title The window's title.
+     * @param startVisible Whether or not to start the view as visible.
+     * @param defaultCloseOperation What to do when the user closes the window.
+     * @param preferredSize The preferred size of the view.
+     * @param githubManager The manager used for this view.
+     */
+    AbstractView(String title, boolean startVisible, int defaultCloseOperation, Dimension preferredSize, GithubManager githubManager) {
+        super(title);
+        this.githubManager = githubManager;
+        this.childViews = new ArrayList<>();
+        this.parentViews = new ArrayList<>();
+        this.setIconImage(imageIcon.getImage());
+        this.setContentPane(this.buildContentPane());
+        this.setDefaultCloseOperation(defaultCloseOperation);
+        if (preferredSize != null) {
+            this.setSize(preferredSize);
+        }
+        this.setLocationRelativeTo(null);
+        this.pack();
+        this.setVisible(startVisible);
+    }
+
+    /**
+     * Constructs this view. Child classes will define how the content pane is constructed by returning that content
+     * pane here.
+     * @return The content pane containing the view to be rendered.
+     */
+    protected abstract JPanel buildContentPane();
+
+    /**
+     * Resets this view and all form components within it. It is the responsibility of child classes to define how to
+     * reset themselves.
+     */
+    public void reset() {
+        // Child classes can define custom behavior here.
+    }
+
+    /**
+     * Extends the default expose behaviour by recursively disposing all views which are linked to this one.
+     */
+    public void dispose() {
+        for (AbstractView view : this.childViews) {
+            view.dispose();
+        }
+        super.dispose();
+    }
+
+    public GithubManager getGithubManager() {
+        return githubManager;
+    }
+
+    /**
+     * Generates a text input field panel.
+     * @param labelText The text for the label above the panel.
+     * @param textField A reference to the text field that is used in the panel.
+     * @return A JPanel containing the label and text field.
+     */
+    final JPanel generateTextFieldPanel(String labelText, JTextField textField) {
+        JPanel newPanel = new JPanel(new BorderLayout());
+        newPanel.add(new JLabel(labelText), BorderLayout.NORTH);
+        newPanel.add(textField);
+        newPanel.setBorder(BorderFactory.createEmptyBorder(5, 2, 5, 2));
+        return newPanel;
+    }
+
+    /**
+     * Adds a view as linked to this one. That way, this view can be referenced elsewhere, even when hidden.
+     * @param view The view to link.
+     */
+    protected final void addChildView(AbstractView view) {
+        this.childViews.add(view);
+    }
+
+    /**
+     * @return The list of children of this view.
+     */
+    protected final List<AbstractView> getChildViews() {
+        return this.childViews;
+    }
+
+    /**
+     * Adds a view as linked to this one as a parent.
+     * @param view The parent view.
+     */
+    protected final void addParentView(AbstractView view) {
+        this.parentViews.add(view);
+    }
+
+    /**
+     * @return The list of parents of this view.
+     */
+    protected final List<AbstractView> getParentViews() {
+        return this.parentViews;
+    }
+
+    /**
+     * Removes all parents registered to this view.
+     */
+    protected final void removeParents() {
+        this.parentViews.clear();
+    }
+}

src/main/java/nl/andrewlalis/ui/view/CreateAssignmentsView.java

@@ -0,0 +1,53 @@
+package nl.andrewlalis.ui.view;
+
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.ui.control.listeners.create_assignments_view.NextListener;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * In this view, the user will enter the name of an assignments repository to use for the course, or allows the user to
+ * create a new one.
+ *
+ * Once the user is here, it is guaranteed that the github manager has been validated.
+ */
+public class CreateAssignmentsView extends AbstractView {
+
+    private JTextField repositoryNameField;
+
+    public CreateAssignmentsView(GithubManager manager) {
+        super("Create/Set Assignments Repository",
+                false,
+                DISPOSE_ON_CLOSE,
+                null,
+                manager);
+    }
+
+    public String getRepositoryName() {
+        return this.repositoryNameField.getText();
+    }
+
+    @Override
+    protected JPanel buildContentPane() {
+        JPanel contentPane = new JPanel();
+        contentPane.setLayout(new BorderLayout());
+
+        JPanel fieldPanel = new JPanel();
+        fieldPanel.setLayout(new BoxLayout(fieldPanel, BoxLayout.PAGE_AXIS));
+
+        this.repositoryNameField = new JTextField();
+        fieldPanel.add(this.generateTextFieldPanel("Assignments repository name:", this.repositoryNameField));
+        contentPane.add(fieldPanel, BorderLayout.CENTER);
+
+
+        JButton nextButton = new JButton("Next");
+        InputStudentsFileView inputStudentsFileView = new InputStudentsFileView(this.getGithubManager());
+        this.addChildView(inputStudentsFileView);
+        inputStudentsFileView.addParentView(this);
+        nextButton.addActionListener(new NextListener(this, inputStudentsFileView));
+        contentPane.add(nextButton, BorderLayout.SOUTH);
+
+        return contentPane;
+    }
+}

src/main/java/nl/andrewlalis/ui/view/InitializerApp.java

@@ -1,8 +1,8 @@
 package nl.andrewlalis.ui.view;
 
+import nl.andrewlalis.command.CommandExecutor;
 import nl.andrewlalis.model.Organization;
 import nl.andrewlalis.ui.control.OutputTextHandler;
-import nl.andrewlalis.ui.control.command.CommandExecutor;
 import nl.andrewlalis.ui.control.listeners.*;
 
 import javax.swing.*;
@@ -129,11 +129,6 @@ public class InitializerApp extends JFrame {
         commonActionsPanel.add(this.generateButtonPanel("Delegate Student Teams", new DelegateStudentTeamsListener(this.executor, this)));
         commonActionsPanel.add(this.generateButtonPanel("Generate Assignments Repo", new GenerateAssignmentsRepoListener(this.executor, this)));
 
-        // TODO: Enable this once the define teams dialog is complete.
-//        JButton defineTaTeamsButton = new JButton("Define TA Teams");
-//        defineTaTeamsButton.addActionListener(new DefineTaTeamsListener(this.executor, this));
-//        commonActionsPanel.add(f);
-
         commonActionsPanel.add(this.generateButtonPanel("Delete Repos", new DeleteReposListener(this.executor, this)));
 
         // Extra panel to push buttons to the top.

src/main/java/nl/andrewlalis/ui/view/InputStudentsFileView.java

@@ -0,0 +1,56 @@
+package nl.andrewlalis.ui.view;
+
+import nl.andrewlalis.Main;
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.ui.control.listeners.input_students_file_view.DoneListener;
+import nl.andrewlalis.ui.control.listeners.input_students_file_view.FileSelectListener;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * In this view, the user will select a file to read a list of students from, and generates the list of teams from that.
+ */
+public class InputStudentsFileView extends AbstractView {
+
+    private JTextField studentsPerTeamField;
+
+    InputStudentsFileView(GithubManager manager) {
+        super("Input Students CSV",
+                false,
+                DISPOSE_ON_CLOSE,
+                null,
+                manager);
+    }
+
+    public int getStudentsPerTeam() {
+        return Integer.parseUnsignedInt(this.studentsPerTeamField.getText());
+    }
+
+    @Override
+    protected JPanel buildContentPane() {
+        JPanel contentPane = new JPanel(new BorderLayout());
+
+        JLabel helpLabel = new JLabel("Please select the CSV file containing student sign-up responses.");
+        contentPane.add(helpLabel, BorderLayout.NORTH);
+
+        JPanel inputPanel = new JPanel();
+        inputPanel.setLayout(new BoxLayout(inputPanel, BoxLayout.PAGE_AXIS));
+        // Button to select a file.
+        JButton selectFileButton = new JButton("Select File");
+        this.studentsPerTeamField = new JTextField("2");
+        inputPanel.add(this.generateTextFieldPanel("How many students per team?", this.studentsPerTeamField));
+        selectFileButton.addActionListener(new FileSelectListener(this));
+        inputPanel.add(selectFileButton);
+
+        contentPane.add(inputPanel, BorderLayout.CENTER);
+
+        // Button to confirm and move to the next view.
+        JButton doneButton = new JButton("Done");
+        Main.getManagementView().addParentView(this);
+        doneButton.addActionListener(new DoneListener(this, Main.getManagementView()));
+        contentPane.add(doneButton, BorderLayout.SOUTH);
+
+        return contentPane;
+    }
+}

src/main/java/nl/andrewlalis/ui/view/ManagementView.java

@@ -0,0 +1,186 @@
+package nl.andrewlalis.ui.view;
+
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.model.database.DbHelper;
+import nl.andrewlalis.model.database.DbUtil;
+import nl.andrewlalis.ui.control.listeners.management_view.PopupSelector;
+import nl.andrewlalis.ui.control.listeners.management_view.student_actions.RemoveFromCourseListener;
+import nl.andrewlalis.ui.view.components.DetailPanel;
+import nl.andrewlalis.ui.view.table_models.StudentTableModel;
+import nl.andrewlalis.ui.view.table_models.StudentTeamTableModel;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+/**
+ * The view in which the user manages a course.
+ */
+public class ManagementView extends AbstractView {
+
+    /**
+     * The model for the students table.
+     */
+    private StudentTableModel studentsModel;
+
+    /**
+     * The model for the student teams table.
+     */
+    private StudentTeamTableModel studentTeamModel;
+
+    /**
+     * A panel which displays the details of selected entities.
+     */
+    private DetailPanel detailPanel;
+
+    public ManagementView(GithubManager githubManager) {
+        super(
+                "Course Management",
+                false,
+                DISPOSE_ON_CLOSE,
+                null,
+                githubManager
+        );
+        this.setExtendedState(this.getExtendedState() | JFrame.MAXIMIZED_BOTH);
+
+        // Dispose of all parents when this window closes. This is unique to the management view.
+        this.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosed(WindowEvent windowEvent) {
+                for (AbstractView parent : getParentViews()) {
+                    parent.dispose();
+                }
+                DbUtil.tearDown(); // Shut down the database session factory once everything is done.
+            }
+        });
+    }
+
+    @Override
+    protected JPanel buildContentPane() {
+        JPanel contentPane = new JPanel(new BorderLayout());
+        contentPane.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
+
+        this.detailPanel = new DetailPanel();
+
+        contentPane.add(this.buildCommandPanel(), BorderLayout.WEST);
+        contentPane.add(this.detailPanel, BorderLayout.EAST);
+        contentPane.add(this.buildOverviewPanel(), BorderLayout.CENTER);
+
+        return contentPane;
+    }
+
+    /**
+     * @return A JPanel for the command prompt interface.
+     */
+    private JPanel buildCommandPanel() {
+        JPanel commandPanel = new JPanel(new BorderLayout());
+        commandPanel.setBorder(BorderFactory.createLoweredBevelBorder());
+
+        commandPanel.add(new JLabel("Commands", SwingConstants.CENTER), BorderLayout.NORTH);
+        commandPanel.add(new JTextArea("Command prompt area goes here."), BorderLayout.CENTER);
+
+        // Construct the sub-panel for commands at the bottom of the panel.
+        JPanel inputPanel = new JPanel(new BorderLayout());
+        JTextField commandTextField = new JTextField();
+        inputPanel.add(commandTextField, BorderLayout.CENTER);
+
+        commandPanel.add(inputPanel, BorderLayout.SOUTH);
+
+        return commandPanel;
+    }
+
+    /**
+     * @return Builds the overview panel, containing a listing of entities.
+     */
+    private JPanel buildOverviewPanel() {
+        JPanel overviewPanel = new JPanel(new BorderLayout());
+        overviewPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
+
+        overviewPanel.add(this.buildSearchPanel(), BorderLayout.NORTH);
+
+        // The real container for all the data views.
+        JTabbedPane tabbedPane = new JTabbedPane();
+
+        tabbedPane.addTab("Students", this.buildStudentsTablePanel());
+        tabbedPane.addTab("Student Teams", this.buildStudentTeamsTablePanel());
+        tabbedPane.addTab("Teaching Assistants", this.buildTAsTablePanel());
+
+        overviewPanel.add(tabbedPane, BorderLayout.CENTER);
+
+        return overviewPanel;
+    }
+
+    /**
+     * Builds a JPanel containing utilities to search the data in the various tables in the application.
+     * @return A JPanel containing search functionality.
+     */
+    private JPanel buildSearchPanel() {
+        JPanel searchPanel = new JPanel(new BorderLayout());
+
+        searchPanel.add(new JLabel("Search", SwingConstants.LEFT), BorderLayout.WEST);
+        searchPanel.add(new JTextField(), BorderLayout.CENTER);
+
+        return searchPanel;
+    }
+
+    /**
+     * Provides a JScrollPane and JPanel to surround a table.
+     * @param table The table to wrap.
+     * @return The JPanel containing the table, wrapped in a JScrollPane.
+     */
+    private JPanel buildGenericTablePanel(JTable table) {
+        JPanel surroundingPanel = new JPanel(new BorderLayout());
+        surroundingPanel.add(new JScrollPane(table), BorderLayout.CENTER);
+        return surroundingPanel;
+    }
+
+    /**
+     * @return A JPanel to be put into a tab for display of a list of students.
+     */
+    private JPanel buildStudentsTablePanel() {
+        // Initialize the model, table, and a surrounding scroll pane.
+        this.studentsModel = new StudentTableModel(DbHelper.getStudents());
+
+        JTable table = new JTable(this.studentsModel);
+        table.setFillsViewportHeight(true);
+        table.getSelectionModel().addListSelectionListener(listSelectionEvent -> {
+            detailPanel.setDetailableEntity(studentsModel.getStudentAt(table.getSelectedRow()));
+        });
+        JPopupMenu menu = new JPopupMenu("Menu");
+        JMenuItem removeItem = new JMenuItem("Remove from course");
+        removeItem.addActionListener(new RemoveFromCourseListener(table));
+        menu.add(removeItem);
+        menu.addPopupMenuListener(new PopupSelector(table));
+        table.setComponentPopupMenu(menu);
+
+        return this.buildGenericTablePanel(table);
+    }
+
+    /**
+     * @return A JPanel to be put into a tab for display of a list of student teams.
+     */
+    private JPanel buildStudentTeamsTablePanel() {
+        this.studentTeamModel = new StudentTeamTableModel(DbHelper.getStudentTeams());
+
+        JTable table = new JTable(this.studentTeamModel);
+        table.setFillsViewportHeight(true);
+        table.getSelectionModel().addListSelectionListener(listSelectionEvent -> {
+            detailPanel.setDetailableEntity(studentTeamModel.getStudentTeamAt(table.getSelectedRow()));
+        });
+
+        return this.buildGenericTablePanel(table);
+    }
+
+    private JPanel buildTAsTablePanel() {
+        return new JPanel();
+    }
+
+    /**
+     * Updates all models in the management view in accordance with the database.
+     */
+    public void updateModels() {
+        this.studentsModel.setStudentsList(DbHelper.getStudents());
+        this.studentTeamModel.setStudentTeamsList(DbHelper.getStudentTeams());
+    }
+}

src/main/java/nl/andrewlalis/ui/view/StartView.java

@@ -0,0 +1,86 @@
+package nl.andrewlalis.ui.view;
+
+import nl.andrewlalis.Main;
+import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.ui.control.listeners.ViewChangeListener;
+import nl.andrewlalis.ui.control.listeners.start_view.CreateAssignmentsRepoListener;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * At this view, the user is asked to first enter the name of the organization, and the access token they created for
+ * their authenticated Github account.
+ *
+ * Then, the user must choose whether they are starting a new course setup, or managing an existing one.
+ *
+ * If they choose to start a new course, they are taken to the AssignmentsRepoView, otherwise if they want to manage
+ * an existing course, they are taken to the ManagementView.
+ */
+public class StartView extends AbstractView {
+
+    // Fields which hold information needed by the Github Manager.
+    private JTextField organizationNameField;
+    private JTextField accessTokenField;
+
+    public StartView(GithubManager githubManager) {
+        super("Github Initializer Startup",
+                true,
+                DISPOSE_ON_CLOSE,
+                null,
+                githubManager);
+    }
+
+    /**
+     * Constructs the starting view, with pre-defined organization and access tokens.
+     * @param githubManager A reference to the github manager this application uses.
+     * @param organizationName The name of the organization.
+     * @param accessToken The access token from the user.
+     */
+    public StartView(GithubManager githubManager, String organizationName, String accessToken) {
+        this(githubManager);
+        this.organizationNameField.setText(organizationName);
+        this.accessTokenField.setText(accessToken);
+    }
+
+    public String getOrganizationName() {
+        return this.organizationNameField.getText();
+    }
+
+    public String getAccessToken() {
+        return this.accessTokenField.getText();
+    }
+
+    @Override
+    protected JPanel buildContentPane() {
+        JPanel contentPane = new JPanel(new BorderLayout());
+
+        JPanel infoInputPanel = new JPanel();
+        infoInputPanel.setLayout(new BoxLayout(infoInputPanel, BoxLayout.PAGE_AXIS));
+        this.organizationNameField = new JTextField();
+        this.accessTokenField = new JTextField();
+        infoInputPanel.add(this.generateTextFieldPanel("Organization name:", this.organizationNameField));
+        infoInputPanel.add(this.generateTextFieldPanel("Access token:", this.accessTokenField));
+
+        JPanel buttonsPanel = new JPanel();
+        // Create the button for going to the Create assignments repository view.
+        JButton assignmentsViewButton = new JButton("Start New Course");
+        CreateAssignmentsView assignmentsView = new CreateAssignmentsView(this.getGithubManager());
+        this.addChildView(assignmentsView);
+        assignmentsView.addParentView(this);
+        assignmentsViewButton.addActionListener(new CreateAssignmentsRepoListener(this, assignmentsView));
+
+        // Create the button for going straight to the management view.
+        JButton managementViewButton = new JButton("Manage Existing Course");
+        this.addChildView(Main.getManagementView());
+        Main.getManagementView().addParentView(this);
+        managementViewButton.addActionListener(new ViewChangeListener(this, Main.getManagementView()));
+
+        buttonsPanel.add(assignmentsViewButton);
+        buttonsPanel.add(managementViewButton);
+
+        contentPane.add(infoInputPanel, BorderLayout.CENTER);
+        contentPane.add(buttonsPanel, BorderLayout.SOUTH);
+        return contentPane;
+    }
+}

src/main/java/nl/andrewlalis/ui/view/components/DetailPanel.java

@@ -0,0 +1,95 @@
+package nl.andrewlalis.ui.view.components;
+
+import nl.andrewlalis.ui.view.table_models.DetailPairsModel;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * The detail panel is meant for displaying the details of a specific entity. The actual content/details to display is
+ * given by classes which implement the Detailable interface.
+ */
+public class DetailPanel extends JPanel {
+
+    /**
+     * The name field shows the entity's name.
+     */
+    private JTextField nameField;
+
+    /**
+     * The description area shows the entity's description.
+     */
+    private JTextArea descriptionTextArea;
+
+    /**
+     * A model to represent the key-value pairs of this entity.
+     */
+    private DetailPairsModel detailPairsModel;
+
+    /**
+     * Creates the panel with some basic empty components.
+     */
+    public DetailPanel() {
+        super();
+        this.setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
+        this.add(new JLabel("Details", SwingConstants.CENTER));
+        this.add(this.buildNamePanel());
+        this.add(this.buildDescriptionPanel());
+        this.add(this.buildPairsTablePanel());
+    }
+
+    /**
+     * Sets this panel's properties according to the given entity.
+     * @param entity The entity to get details from.
+     */
+    public void setDetailableEntity(Detailable entity) {
+        this.nameField.setText(entity.getDetailName());
+        this.descriptionTextArea.setText(entity.getDetailDescription());
+        this.detailPairsModel.setPairs(entity.getDetailPairs());
+    }
+
+    /**
+     * @return A JPanel containing the name field.
+     */
+    private JPanel buildNamePanel() {
+        this.nameField = new JTextField();
+        this.nameField.setEditable(false);
+
+        JPanel namePanel = new JPanel(new BorderLayout());
+        namePanel.add(new JLabel("Name:", SwingConstants.LEFT), BorderLayout.WEST);
+        namePanel.add(this.nameField, BorderLayout.CENTER);
+
+        return namePanel;
+    }
+
+    /**
+     * @return A JPanel containing the description text area.
+     */
+    private JPanel buildDescriptionPanel() {
+        this.descriptionTextArea = new JTextArea();
+        this.descriptionTextArea.setEditable(false);
+
+        JPanel descriptionPanel = new JPanel(new BorderLayout());
+        descriptionPanel.add(new JLabel("Description:", SwingConstants.CENTER), BorderLayout.NORTH);
+        descriptionPanel.add(this.descriptionTextArea, BorderLayout.CENTER);
+
+        return descriptionPanel;
+    }
+
+    /**
+     * @return A JPanel containing a table of properties.
+     */
+    private JPanel buildPairsTablePanel() {
+        this.detailPairsModel = new DetailPairsModel();
+
+        JPanel tablePanel = new JPanel(new BorderLayout());
+        tablePanel.add(new JLabel("Properties:", SwingConstants.LEFT), BorderLayout.NORTH);
+
+        JTable pairsTable = new JTable(this.detailPairsModel);
+        JScrollPane scrollPane = new JScrollPane(pairsTable);
+        tablePanel.add(scrollPane, BorderLayout.CENTER);
+
+        return tablePanel;
+    }
+
+}

src/main/java/nl/andrewlalis/ui/view/components/Detailable.java

@@ -0,0 +1,27 @@
+package nl.andrewlalis.ui.view.components;
+
+import nl.andrewlalis.util.Pair;
+
+import java.util.List;
+
+/**
+ * Objects which implement this interface must provide
+ */
+public interface Detailable {
+
+    /**
+     * @return The display name for this object.
+     */
+    String getDetailName();
+
+    /**
+     * @return Some more information to display below the name for this object.
+     */
+    String getDetailDescription();
+
+    /**
+     * @return A String-to-String mapping for some key value pairs of properties to display.
+     */
+    List<Pair<String, String>> getDetailPairs();
+
+}

src/main/java/nl/andrewlalis/ui/view/dialogs/TeamChooserDialog.java

@@ -0,0 +1,18 @@
+package nl.andrewlalis.ui.view.dialogs;
+
+import nl.andrewlalis.model.Team;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class TeamChooserDialog extends JDialog {
+
+    public TeamChooserDialog(Window parent) {
+        super(parent);
+    }
+
+    public Team getSelectedTeam() {
+        return null;
+    }
+
+}

src/main/java/nl/andrewlalis/ui/view/table_models/DetailPairsModel.java

@@ -0,0 +1,64 @@
+package nl.andrewlalis.ui.view.table_models;
+
+import nl.andrewlalis.util.Pair;
+
+import javax.swing.table.AbstractTableModel;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents the small (2 column) table to display properties of a detailable entity.
+ */
+public class DetailPairsModel extends AbstractTableModel {
+
+    /**
+     * The pairs of properties.
+     */
+    private List<Pair<String, String>> pairs;
+
+    /**
+     * Columns for this model.
+     */
+    private String[] columns = {"Property", "Value"};
+
+    /**
+     * Constructs an empty list of pairs.
+     */
+    public DetailPairsModel() {
+        this.pairs = new ArrayList<>();
+    }
+
+    public void setPairs(List<Pair<String, String>> pairs) {
+        this.pairs = pairs;
+        this.fireTableDataChanged();
+    }
+
+    @Override
+    public int getRowCount() {
+        return this.pairs.size();
+    }
+
+    @Override
+    public int getColumnCount() {
+        return this.columns.length;
+    }
+
+    @Override
+    public String getColumnName(int i) {
+        return this.columns[i];
+    }
+
+    @Override
+    public Object getValueAt(int i, int i1) {
+        Pair pair = this.pairs.get(i);
+
+        switch (i1) {
+            case 0:
+                return pair.getFirst();
+            case 1:
+                return pair.getSecond();
+            default:
+                return null;
+        }
+    }
+}

src/main/java/nl/andrewlalis/ui/view/table_models/StudentTableModel.java

@@ -0,0 +1,86 @@
+package nl.andrewlalis.ui.view.table_models;
+
+import nl.andrewlalis.model.Student;
+
+import javax.swing.table.AbstractTableModel;
+import java.util.List;
+
+/**
+ * This table model is used for the representation of a list of persons, with their basic information.
+ */
+public class StudentTableModel extends AbstractTableModel {
+
+    /**
+     * The list of data that is used in the table.
+     */
+    private List<Student> studentsList;
+
+    /**
+     * A default list of column headers for this table.
+     */
+    private String[] columns = {"Number", "Name", "Email", "Github", "Team"};
+
+    /**
+     * Constructs a new model based on the given list of students.
+     * @param studentsList A list of students to display in the table model.
+     */
+    public StudentTableModel(List<Student> studentsList) {
+        this.studentsList = studentsList;
+    }
+
+    /**
+     * Sets a new list of students as the data for this list model.
+     * @param newList The new list of students to use.
+     */
+    public void setStudentsList(List<Student> newList) {
+        this.studentsList = newList;
+        this.fireTableDataChanged();
+    }
+
+    /**
+     * Gets the student in a particular row.
+     * @param row The row of the table.
+     * @return The student object at the specified row, or null if none is found.
+     */
+    public Student getStudentAt(int row) {
+        if (row >= 0 && row < this.studentsList.size()) {
+            return this.studentsList.get(row);
+        }
+        return null;
+    }
+
+    @Override
+    public int getRowCount() {
+        return studentsList.size();
+    }
+
+    @Override
+    public int getColumnCount() {
+        return this.columns.length;
+    }
+
+    @Override
+    public String getColumnName(int i) {
+        return this.columns[i];
+    }
+
+    @Override
+    public Object getValueAt(int row, int col) {
+        Student student = this.getStudentAt(row);
+
+        switch(col) {
+            case 0:
+                return student.getNumber();
+            case 1:
+                return student.getName();
+            case 2:
+                return student.getEmailAddress();
+            case 3:
+                return student.getGithubUsername();
+            case 4:
+                return student.getAssignedTeam().getId();
+            default:
+                return null;
+        }
+    }
+}

src/main/java/nl/andrewlalis/ui/view/table_models/StudentTeamTableModel.java

@@ -0,0 +1,145 @@
+package nl.andrewlalis.ui.view.table_models;
+
+import nl.andrewlalis.model.Student;
+import nl.andrewlalis.model.StudentTeam;
+
+import javax.swing.table.AbstractTableModel;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This table model represents the list of student teams.
+ */
+public class StudentTeamTableModel extends AbstractTableModel {
+
+    /**
+     * The container for the data objects.
+     */
+    private List<StudentTeam> studentTeamsList;
+
+    /**
+     * The column headers for this model. In addition to these headers, this model will dynamically create headers for
+     * each additional student to be listed in the table.
+     */
+    private final String[] staticColumns = {"Number", "Repository Name", "TA Team"};
+
+    /**
+     * Dynamic columns which are generated depending on the teams.
+     */
+    private String[] columns = {};
+
+    public StudentTeamTableModel() {
+        this.studentTeamsList = new ArrayList<>();
+    }
+
+    public StudentTeamTableModel(List<StudentTeam> teams) {
+        super();
+        this.setStudentTeamsList(teams);
+    }
+
+    /**
+     * Sets a new list of student teams as the data for this list model.
+     * @param newList A list of student teams to display in the table model.
+     */
+    public void setStudentTeamsList(List<StudentTeam> newList) {
+        this.studentTeamsList = newList;
+        int maxMembers = this.getMaxMemberCount();
+        if (this.columns.length != maxMembers) {
+            this.generateColumnNames(maxMembers);
+            this.fireTableStructureChanged();
+        }
+        this.fireTableDataChanged();
+    }
+
+    /**
+     * Gets the student team in a particular row.
+     * @param row The row of the table.
+     * @return The student team object at the specified row, or null if none is found.
+     */
+    public StudentTeam getStudentTeamAt(int row) {
+        if (row >= 0 && row < this.studentTeamsList.size()) {
+            return this.studentTeamsList.get(row);
+        }
+        return null;
+    }
+
+    @Override
+    public int getRowCount() {
+        return this.studentTeamsList.size();
+    }
+
+    @Override
+    public int getColumnCount() {
+        return this.columns.length;
+    }
+
+    @Override
+    public String getColumnName(int i) {
+        if (i >= 0 && i < this.columns.length) {
+            return this.columns[i];
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public Object getValueAt(int i, int i1) {
+        StudentTeam team = this.getStudentTeamAt(i);
+
+        switch (i1) {
+            case 0:
+                return team.getId();
+            case 1:
+                return (team.getRepositoryName() == null) ? "None" : team.getRepositoryName();
+            case 2:
+                return (team.getTaTeam() == null) ? "None" : team.getTaTeam().getDetailName();
+            default:
+                return this.getMemberInColumn(team, i1);
+        }
+    }
+
+    /**
+     * Gets a particular student name in a column of the table. This is used for the staticColumns which show all members in
+     * the team.
+     * @param team The team for which to search for a student in.
+     * @param column The table column.
+     * @return The student detail name in a particular column, or null if none exists.
+     */
+    private String getMemberInColumn(StudentTeam team, int column) {
+        Student[] students = team.getStudents();
+        int index = column - this.staticColumns.length; // Subtract the number of static staticColumns.
+        if (index >= 0 && index < students.length) {
+            return students[index].getDetailName();
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Gets the highest member count in the list of student teams.
+     * @return The maximum member count of all teams.
+     */
+    private int getMaxMemberCount() {
+        int max = 0;
+        for (StudentTeam team : this.studentTeamsList) {
+            if (team.memberCount() > max) {
+                max = team.memberCount();
+            }
+        }
+        return max;
+    }
+
+    /**
+     * Generates column names, including some procedurally generated headers based on the number of members in the team.
+     * @param maxMembers The highest number of members a team has.
+     */
+    private void generateColumnNames(int maxMembers) {
+        this.columns = new String[this.staticColumns.length + maxMembers];
+        this.columns[0] = this.staticColumns[0];
+        this.columns[1] = this.staticColumns[1];
+        this.columns[2] = this.staticColumns[2];
+        for (int i = 0; i < maxMembers; i++) {
+            this.columns[i + this.staticColumns.length] = "Member " + (i + 1);
+        }
+    }
+}

src/main/java/nl/andrewlalis/util/Logging.java

@@ -1,7 +1,10 @@
 package nl.andrewlalis.util;
 
 import java.io.IOException;
-import java.util.logging.*;
+import java.util.logging.FileHandler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.logging.SimpleFormatter;
 
 /**
  * Responsible for creating logs to standard output and writing to files.
@@ -25,7 +28,7 @@ public class Logging {
             e.printStackTrace();
         }
 
-        logger.setLevel(Level.ALL);
+        logger.setLevel(Level.FINEST);
         Logger.getLogger("").setLevel(Level.OFF);
 
     }

src/main/java/nl/andrewlalis/util/Pair.java

@@ -0,0 +1,25 @@
+package nl.andrewlalis.util;
+
+/**
+ * A pair of objects.
+ * @param <T1> The first object.
+ * @param <T2> The second object.
+ */
+public class Pair<T1, T2> {
+
+    private T1 first;
+    private T2 second;
+
+    public Pair(T1 first, T2 second) {
+        this.first = first;
+        this.second = second;
+    }
+
+    public T1 getFirst() {
+        return first;
+    }
+
+    public T2 getSecond() {
+        return second;
+    }
+}

src/main/java/nl/andrewlalis/util/TeamGenerator.java

@@ -2,9 +2,6 @@ package nl.andrewlalis.util;
 
 import nl.andrewlalis.model.Student;
 import nl.andrewlalis.model.StudentTeam;
-import nl.andrewlalis.model.error.Error;
-import nl.andrewlalis.model.error.Severity;
-import nl.andrewlalis.ui.view.InitializerApp;
 import org.apache.commons.csv.CSVFormat;
 import org.apache.commons.csv.CSVRecord;
 
@@ -45,9 +42,9 @@ public class TeamGenerator {
         Iterable<CSVRecord> records = CSVFormat.DEFAULT.withFirstRecordAsHeader().parse(new FileReader(filename));
 
         logger.fine("Reading all records into map.");
-        Map<Integer, Student> studentMap;
+        List<Student> students;
         try {
-            studentMap = readAllStudents(records, teamSize);
+            students = readAllStudents(records, teamSize);
         } catch (ArrayIndexOutOfBoundsException e) {
             logger.severe("StudentTeam size does not match column count in records.");
             throw new IllegalArgumentException("StudentTeam size does not match column count in records.");
@@ -55,7 +52,7 @@ public class TeamGenerator {
 
 
         logger.fine("Generating all valid teams from student map.");
-        return generateAllValidTeams(studentMap, teamSize);
+        return generateAllValidTeams(students, teamSize);
     }
 
     /**
@@ -71,35 +68,39 @@ public class TeamGenerator {
      * After all students with preferred partners are placed in teams, the single students are merged, and their teams
      * are added afterwards.
      *
-     * @param studentMap A mapping for each student to their student number.
+     * @param students A list of students, each with a list of preferred partners.
      * @param teamSize The preferred maximum size for a team.
      * @return A list of teams, most of which are of teamSize size.
      */
-    private static List<StudentTeam> generateAllValidTeams(Map<Integer, Student> studentMap, int teamSize) {
+    private static List<StudentTeam> generateAllValidTeams(List<Student> students, int teamSize) {
-        List<Student> singleStudents = new ArrayList<>(studentMap.values());
+        List<Student> singleStudents = new ArrayList<>(students);
         List<StudentTeam> studentTeams = new ArrayList<>();
 
+        // An integer which increments for each valid team. Used to create identifiers for each team.
         int teamCount = 1;
+
         // For each student, try to make a team from its preferred partners.
-        for (Map.Entry<Integer, Student> e : studentMap.entrySet()) {
+        for (Student student : students) {
-            StudentTeam newTeam = e.getValue().getPreferredTeam(studentMap);
+            StudentTeam newTeam = student.getPreferredTeam();
             logger.finest("Checking if student's preferred team is valid:\n" + newTeam);
             // Check if the team is of a valid size, and is not a duplicate.
-            // Note that at this stage, singles are treated as studentTeams of 1, and thus not valid for any teamSize > 1.
+            // Note that at this stage, singles are treated as student teams of 1, and thus not valid for any team size > 1.
             if (newTeam.isValid(teamSize)) {
                 // We know that the team is valid on its own, so now we check if it has members identical to any team already created.
                 boolean matchFound = false;
                 for (StudentTeam team : studentTeams) {
                     if (newTeam.hasSameMembers(team)) {
                         matchFound = true;
+                        logger.finest("A team was found with the same members: " + team.getId());
                         break;
                     }
                 }
                 if (!matchFound) {
                     // Once we know this team is completely valid, we remove all the students in it from the list of singles.
-                    newTeam.setId(teamCount++);
+                    newTeam.setNumber(teamCount++);
-                    singleStudents.removeAll(Arrays.asList(newTeam.getStudents()));
                     studentTeams.add(newTeam);
+                    singleStudents.removeAll(Arrays.asList(newTeam.getStudents()));
+                    assignStudentsToTeam(newTeam);
                     logger.fine("Created team:\n" + newTeam);
                 }
             }
@@ -114,14 +115,14 @@ public class TeamGenerator {
      * size as possible.
      * @param singleStudents A list of students who have no preferred partners.
      * @param teamSize The preferred team size.
-     * @param teamIndex The current number used in assigning an id to the team.
+     * @param teamIndex The current number used in assigning an number to the team.
      * @return A list of teams comprising of single students.
      */
     private static List<StudentTeam> mergeSingleStudents(List<Student> singleStudents, int teamSize, int teamIndex) {
         List<StudentTeam> studentTeams = new ArrayList<>();
         while (!singleStudents.isEmpty()) {
             StudentTeam t = new StudentTeam();
-            t.setId(teamIndex++);
+            t.setNumber(teamIndex++);
             logger.fine("Creating new team of single students:\n" + t);
             while (t.memberCount() < teamSize && !singleStudents.isEmpty()) {
                 Student s = singleStudents.remove(0);
@@ -129,6 +130,7 @@ public class TeamGenerator {
                 t.addMember(s);
             }
             studentTeams.add(t);
+            assignStudentsToTeam(t);
             logger.fine("Created team:\n" + t);
         }
         return studentTeams;
@@ -141,8 +143,10 @@ public class TeamGenerator {
      * @return A map of all students in the file.
      * @throws ArrayIndexOutOfBoundsException if the teamSize does not work with the columns in the record.
      */
-    private static Map<Integer, Student> readAllStudents(Iterable<CSVRecord> records, int teamSize) throws ArrayIndexOutOfBoundsException {
+    private static List<Student> readAllStudents(Iterable<CSVRecord> records, int teamSize) throws ArrayIndexOutOfBoundsException {
         Map<Integer, Student> studentMap = new HashMap<>();
+        Map<Student, List<Integer>> studentPreferredIds = new HashMap<>();
+        // Perform the initial read of the students.
         for (CSVRecord record : records) {
             logger.finest("Read record: " + record);
             List<Integer> preferredIds = new ArrayList<>();
@@ -152,21 +156,49 @@ public class TeamGenerator {
                     preferredIds.add(Integer.parseInt(record.get(columnOffset + i)));
                 }
             }
-            Student s = new Student(Integer.parseInt(record.get(3)), record.get(2), record.get(1), record.get(4), preferredIds);
+            Student s = new Student();
+            s.setNumber(Integer.parseInt(record.get(3)));
+            s.setName(record.get(2));
+            s.setEmailAddress(record.get(1));
+            s.setGithubUsername(record.get(4));
             if (studentMap.containsValue(s)) {
                 logger.warning("Duplicate entry found for student: " + s + "\nOverwriting previous value.");
             }
             studentMap.put(s.getNumber(), s);
+            studentPreferredIds.put(s, preferredIds);
         }
 
-        // Perform a safety check to ensure all preferred partners are valid students.
+        // The final list of students, with preferred partners set.
-        for (Map.Entry<Integer, Student> entry : studentMap.entrySet()) {
+        List<Student> students = new ArrayList<>();
-            // Remove any ids that don't exist in the whole list of students.
+
-            entry.getValue().getPreferredPartners().removeIf(partnerId -> !studentMap.containsKey(partnerId));
+        // Assign students to their preferred students.
+        for (Map.Entry<Student, List<Integer>> entry : studentPreferredIds.entrySet()) {
+            Student s = entry.getKey();
+            for (int partnerNumber : entry.getValue()) {
+                // Check that this preferred partner number exists.
+                if (studentMap.containsKey(partnerNumber)) {
+                    s.addPreferredPartner(studentMap.get(partnerNumber));
+                } else {
+                    logger.warning("Student " + s + " has invalid preferred partner.");
+                }
+            }
+            students.add(s);
         }
+
         // At this point, all students are valid, and all preferred partners are valid.
-        logger.fine("Read " + studentMap.size() + " students from records.");
+        logger.fine("Read " + students.size() + " students from records.");
-        return studentMap;
+        return students;
+    }
+
+    /**
+     * Assigns all students in the given team to that team, such that all students then have a reference to the team
+     * they are in.
+     * @param team The team to assign students for.
+     */
+    private static void assignStudentsToTeam(StudentTeam team) {
+        for (Student student : team.getStudents()) {
+            student.assignToTeam(team);
+        }
     }
 
 }

src/main/resources/hibernate.cfg.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>
+    <session-factory>
+        <!-- Database connection settings -->
+        <property name="hibernate.connection.driver_class">org.h2.Driver</property>
+        <property name="hibernate.connection.url">jdbc:h2:./initializer.h2</property>
+        <property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
+        <property name="hibernate.connection.username">root</property>
+        <property name="hibernate.connection.password">root</property>
+
+        <!-- JDBC connection pool -->
+        <property name="connection.pool_size">1</property>
+
+        <!-- Debugging to show sql queries. -->
+        <property name="show_sql">false</property>
+
+        <!-- Set Hibernate to create tables beforehand. -->
+        <property name="hibernate.hbm2ddl.auto">create-drop</property>
+
+        <!-- Mapping -->
+        <mapping class="nl.andrewlalis.model.Team"/>
+        <mapping class="nl.andrewlalis.model.Student"/>
+        <mapping class="nl.andrewlalis.model.StudentTeam"/>
+        <mapping class="nl.andrewlalis.model.TeachingAssistant"/>
+        <mapping class="nl.andrewlalis.model.TATeam"/>
+    </session-factory>
+</hibernate-configuration>

src/main/resources/sql/insert/types.sql

@@ -1,19 +0,0 @@
-INSERT INTO person_types (id, name)
-VALUES (0, 'student'),
-       (1, 'teaching-assistant'),
-       (2, 'professor');
-
-INSERT INTO team_types (id, name)
-VALUES (0, 'student_team'),
-       (1, 'teaching_assistant_team'),
-       (2, 'all_teaching_assistants'),
-       (3, 'none');
-
-INSERT INTO teams (id, team_type_id)
-VALUES (1000000, 3), -- None team for all students or TA's without a team.
-       (1000001, 2); -- Team for all teaching assistants.
-
-INSERT INTO error_types (id, name)
-VALUES (0, 'team_error'),
-       (1, 'person_error'),
-       (2, 'system_error');

src/main/resources/sql/table_init.sql

@@ -1,153 +0,0 @@
-PRAGMA foreign_keys = TRUE;
-PRAGMA writable_schema = 1;
-DELETE FROM sqlite_master WHERE type IN ('table', 'index', 'trigger');
-PRAGMA writable_schema = 0;
-VACUUM;
-
--- Basic schema design.
-CREATE TABLE IF NOT EXISTS person_types (
-  id INTEGER PRIMARY KEY,
-  name TEXT NOT NULL UNIQUE
-);
-
-CREATE TABLE IF NOT EXISTS persons (
-  id INTEGER PRIMARY KEY,
-  name TEXT NOT NULL,
-  email_address TEXT NOT NULL,
-  github_username TEXT NOT NULL UNIQUE,
-  person_type_id INTEGER NOT NULL,
-  team_id INTEGER NULL,
-  FOREIGN KEY (person_type_id)
-    REFERENCES person_types(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  FOREIGN KEY (team_id)
-    REFERENCES teams(id)
-      ON DELETE CASCADE
-      ON UPDATE CASCADE
-);
-
--- Team tables for all types of teams.
-CREATE TABLE IF NOT EXISTS team_types (
-  id INTEGER PRIMARY KEY,
-  name TEXT NOT NULL UNIQUE
-);
-
-CREATE TABLE IF NOT EXISTS teams (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  team_type_id INTEGER NOT NULL,
-  FOREIGN KEY (team_type_id)
-    REFERENCES team_types(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
-CREATE TABLE IF NOT EXISTS team_members (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  team_id INTEGER NOT NULL,
-  person_id INTEGER NOT NULL,
-  FOREIGN KEY (team_id)
-    REFERENCES teams(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  FOREIGN KEY (person_id)
-    REFERENCES persons(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  UNIQUE (team_id, person_id)
-);
-
-CREATE TABLE IF NOT EXISTS teaching_assistant_teams (
-  team_id INTEGER PRIMARY KEY,
-  name TEXT NOT NULL UNIQUE,
-  FOREIGN KEY (team_id)
-    REFERENCES teams(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
-CREATE TABLE IF NOT EXISTS student_teams (
-  team_id INTEGER PRIMARY KEY,
-  repository_name TEXT,
-  teaching_assistant_team_id INTEGER,
-  FOREIGN KEY (team_id)
-    REFERENCES teams(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  FOREIGN KEY (teaching_assistant_team_id)
-    REFERENCES  teaching_assistant_teams(team_id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
--- Student-specific tables.
-CREATE TABLE IF NOT EXISTS students (
-  person_id INTEGER PRIMARY KEY,
-  chose_partner INTEGER NOT NULL,
-  FOREIGN KEY (person_id)
-    REFERENCES persons(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
-CREATE TABLE IF NOT EXISTS student_preferred_partners (
-  student_id INTEGER PRIMARY KEY,
-  partner_id INTEGER NOT NULL,
-  FOREIGN KEY (student_id)
-    REFERENCES students(person_id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  UNIQUE (student_id, partner_id)
-);
-
--- TeachingAssistant-specific tables.
-CREATE TABLE IF NOT EXISTS teaching_assistants (
-  person_id INTEGER PRIMARY KEY,
-  FOREIGN KEY (person_id)
-    REFERENCES persons(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
--- Error queue storage.
-CREATE TABLE IF NOT EXISTS error_types (
-  id INTEGER PRIMARY KEY,
-  name TEXT NOT NULL UNIQUE
-);
-
-CREATE TABLE IF NOT EXISTS errors (
-  id INTEGER PRIMARY KEY,
-  timestamp DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  error_type_id INTEGER NOT NULL,
-  message TEXT NOT NULL,
-  FOREIGN KEY (error_type_id)
-    REFERENCES error_types(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
-CREATE TABLE IF NOT EXISTS team_errors (
-  error_id INTEGER PRIMARY KEY,
-  team_id INTEGER NOT NULL,
-  FOREIGN KEY (error_id)
-    REFERENCES errors(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  FOREIGN KEY (team_id)
-    REFERENCES teams(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);
-
-CREATE TABLE IF NOT EXISTS person_errors (
-  error_id INTEGER PRIMARY KEY,
-  person_id INTEGER NOT NULL,
-  FOREIGN KEY (error_id)
-    REFERENCES errors(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE,
-  FOREIGN KEY (person_id)
-    REFERENCES persons(id)
-    ON DELETE CASCADE
-    ON UPDATE CASCADE
-);