diff --git a/src/main/java/com/andrewlalis/perfin/data/DataSource.java b/src/main/java/com/andrewlalis/perfin/data/DataSource.java
index 18099a8..2956c11 100644
--- a/src/main/java/com/andrewlalis/perfin/data/DataSource.java
+++ b/src/main/java/com/andrewlalis/perfin/data/DataSource.java
@@ -15,7 +15,16 @@ import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
 
+/**
+ * Interface for methods to obtain any data from a {@link com.andrewlalis.perfin.model.Profile}
+ * instance. Usually, you'll obtain a repository to interact with entities of a
+ * certain type.
+ */
 public interface DataSource {
+    /**
+     * Gets the directory in which file content is stored.
+     * @return The content directory.
+     */
     Path getContentDir();
 
     AccountRepository getAccountRepository();
diff --git a/src/main/java/com/andrewlalis/perfin/data/impl/JdbcAccountRepository.java b/src/main/java/com/andrewlalis/perfin/data/impl/JdbcAccountRepository.java
index 50ab7ef..b8ee943 100644
--- a/src/main/java/com/andrewlalis/perfin/data/impl/JdbcAccountRepository.java
+++ b/src/main/java/com/andrewlalis/perfin/data/impl/JdbcAccountRepository.java
@@ -1,10 +1,10 @@
 package com.andrewlalis.perfin.data.impl;
 
 import com.andrewlalis.perfin.data.AccountRepository;
-import com.andrewlalis.perfin.data.util.DateUtil;
-import com.andrewlalis.perfin.data.util.DbUtil;
 import com.andrewlalis.perfin.data.pagination.Page;
 import com.andrewlalis.perfin.data.pagination.PageRequest;
+import com.andrewlalis.perfin.data.util.DateUtil;
+import com.andrewlalis.perfin.data.util.DbUtil;
 import com.andrewlalis.perfin.model.Account;
 import com.andrewlalis.perfin.model.AccountEntry;
 import com.andrewlalis.perfin.model.AccountType;