diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/columns/DailySudokuColumns.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/columns/DailySudokuColumns.java
index 248371a..af4afe9 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/columns/DailySudokuColumns.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/columns/DailySudokuColumns.java
@@ -8,7 +8,9 @@ import org.secuso.privacyfriendlysudoku.controller.database.model.DailySudoku;
 import org.secuso.privacyfriendlysudoku.controller.database.model.Level;
 
 
-
+/**
+ * Defines a database schema for saving daily sudokus
+ */
 public class DailySudokuColumns extends LevelColumns {
 
     public static final String TABLE_NAME = "ds_levels";
@@ -42,6 +44,11 @@ public class DailySudokuColumns extends LevelColumns {
             "DROP TABLE IF EXISTS " + TABLE_NAME;
 
 
+    /**
+     * Create a new DailySudoku object using the data stored in a specific database row
+     * @param c the cursor pointing to the row whose data should be used
+     * @return the DailySudoku object created using the data from the database row
+     */
     public static DailySudoku getLevel(Cursor c) {
         Level level = LevelColumns.getLevel(c);
         int hintsUsed = c.getInt(c.getColumnIndexOrThrow(HINTS_USED));
@@ -49,6 +56,11 @@ public class DailySudokuColumns extends LevelColumns {
         return new DailySudoku(level.getId(), level.getDifficulty(), level.getGameType(), level.getPuzzle(), hintsUsed, timeNeeded);
     }
 
+    /**
+     * Given a specific DailySudoku instance, extracts all relevant parameters and saves them to a ContentValues object
+     * @param record the DailySudoku instance whose parameters should be extracted
+     * @return the ContentValues instance containing the extracted parameters
+     */
     public static ContentValues getValues(DailySudoku record) {
         ContentValues result = LevelColumns.getValues(record);
         result.put(HINTS_USED, record.getHintsUsed());
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/model/DailySudoku.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/model/DailySudoku.java
index a78c660..9732a58 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/model/DailySudoku.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/database/model/DailySudoku.java
@@ -3,6 +3,9 @@ package org.secuso.privacyfriendlysudoku.controller.database.model;
 import org.secuso.privacyfriendlysudoku.game.GameDifficulty;
 import org.secuso.privacyfriendlysudoku.game.GameType;
 
+/**
+ * Models the content of a single row of the daily sudoku database
+ */
 public class DailySudoku extends Level {
     private int hintsUsed;
     private String timeNeeded;
@@ -13,18 +16,35 @@ public class DailySudoku extends Level {
         this.timeNeeded = timeNeeded;
     }
 
+    /**
+     * Return the amount of hints the user needed to solve this sudoku
+     * @return the amount of hints the user needed to solve this sudoku
+     */
     public int getHintsUsed() {
         return hintsUsed;
     }
 
+    /**
+     * Set a new value for the hintsUsed attribute of this daily sudoku
+     * @param hintsUsed the new value for the hintsUsed attribute
+     */
     public void setHintsUsed(int hintsUsed) {
         this.hintsUsed = hintsUsed;
     }
 
+    /**
+     * Return the time the user needed to solve this sudoku as a string
+     * @return the time the user needed to solve this sudoku as a string
+     */
     public String getTimeNeeded() {
         return timeNeeded;
     }
 
+    /**
+     * Return the time the user needed to solve this sudoku in seconds
+     * @return the time the user needed to solve this sudoku in seconds (or 0 if the timeNeeded parameter
+     * does not have the right format)
+     */
     public int getTimeNeededInSeconds() {
         if (timeNeeded.matches("/d/d:/d/d:/d/d")) {
             String[] timeInstances = timeNeeded.split(":");
@@ -39,6 +59,10 @@ public class DailySudoku extends Level {
         return 0;
     }
 
+    /**
+     * Set a new value for the timeNeeded attribute of this daily sudoku
+     * @param timeNeeded the new value for the timeNeeded attribute
+     */
     public void setTimeNeeded(String timeNeeded) {
         this.timeNeeded = timeNeeded;
     }