added all Notifications for the model view communication

added all required notifications with their content and getter methods.

Projekte/mdga/model/src/main/java/pp.mdga/notification/PieceInGameNotification.java

@@ -4,8 +4,34 @@
 
 import java.util.UUID;
 
+/**
+ * Notification that a piece is in the game
+ */
 public class PieceInGameNotification extends Notification{
-    PieceInGameNotification(Color color, UUID id) {
+    private Color color;
+    private UUID id;
 
+    /**
+     * Constructor
+     * @param color the color of the piece
+     * @param id the id of the piece
+     */
+    PieceInGameNotification(Color color, UUID id) {
+        this.color = color;
+        this.id = id;
+    }
+
+    /**
+     * @return the color of the piece
+     */
+    public Color getColor() {
+        return null;
+    }
+
+    /**
+     * @return the id of the piece
+     */
+    public UUID getId() {
+        return null;
     }
 }