Added documentation.

app/src/main/java/fr/iutfbleau/sae/MainActivity.java

@@ -7,21 +7,38 @@ import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.widget.Button;
 
-
+/**
+ * {@code MainActivity} is the activity that displays the main menu.
+ * 
+ * @autor Alexeï Kadir, Lyanis Souidi, Hugo Dimitrijevic
+ * @version 1.0
+ */
 public class MainActivity extends AppCompatActivity {
-    
+    /**
+     * The {@code Button} that starts the game when clicked.
+     */
     private Button play;
 
-    
+    /**
+     * The {@code Button} that opens the settings when clicked.
+     */
     private Button settings;
 
-    
+    /**
+     * The {@code Button} that exits the application when clicked.
+     */
     private Button exit;
 
-    
+    /**
+     * The {@code MainController} that controls the main menu.
+     */
     private MainController mainController;
 
-    
+    /**
+     * Creates the main menu.
+     * 
+     * @param savedInstanceState The saved instance state.
+     */
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

app/src/main/java/fr/iutfbleau/sae/MainController.java

@@ -9,23 +9,41 @@ import android.view.View;
 
 import java.util.prefs.Preferences;
 
-
+/**
+ * {@code MainController} is a class that controls the main menu by recieving
+ * events from the {@code MainActivity}.
+ * 
+ * @autor Alexeï Kadir, Lyanis Souidi, Hugo Dimitrijevic
+ * @version 1.0
+ */
 public class MainController implements View.OnClickListener {
-    
+    /**
+     * The key of the preference that stores the size of the cross.
+     */
     private static final String SIZE_PREFERENCE_KEY = "size_preference";
 
-    
+    /**
+     * The key of the preference that stores whether the game is in hard mode.
+     */
     private static final String HARD_MODE_PREFERENCE_KEY = "hard_mode_preference";
 
-    
+    /**
+     * The {@code Activity} that contains the main menu.
+     */
     private final Activity activity;
 
-    
+    /**
+     * Creates the main menu controller.
+     * 
+     * @param activity The {@code Activity} that contains the main menu.
+     */
     public MainController(Activity activity) {
         this.activity = activity;
     }
 
-    
+    /**
+     * Starts a new game with the settings from the preferences.
+     */
     public void play() {
         SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this.activity);
 
@@ -40,17 +58,25 @@ public class MainController implements View.OnClickListener {
         this.activity.startActivity(intent);
     }
 
-    
+    /**
+     * Opens the settings.
+     */
     public void openSettings() {
         this.activity.startActivity(new Intent(this.activity, SettingsActivity.class));
     }
 
-    
+    /**
+     * Exits the application.
+     */
     public void exit() {
         this.activity.finish();
     }
 
-    
+    /**
+     * Handles a click event from the main menu.
+     * 
+     * @param view The {@code View} that was clicked.
+     */
     @Override
     public void onClick(View view) {
         int id = view.getId();