Updated the JavaDocs in multiple classes, to improve readability.

Projekte/mdga/model/src/main/java/pp/mdga/message/client/JoinedLobbyMessage.java

@@ -7,7 +7,9 @@
  */
 @Serializable
 public class JoinedLobbyMessage extends ClientMessage {
-
+    /**
+     * The name of the player that is joining the server.
+     */
     private final String name;
 
     /**

Projekte/mdga/model/src/main/java/pp/mdga/message/client/RequestPlayCardMessage.java

@@ -20,6 +20,9 @@ public class RequestPlayCardMessage extends ClientMessage {
      */
     private final UUID ownPieceIdentifier;
 
+    /**
+     * The identifier of the enemy piece.
+     */
     private final UUID enemyPieceIdentifier;
 
     /**

Projekte/mdga/model/src/main/java/pp/mdga/message/client/SelectTSKMessage.java

@@ -29,6 +29,11 @@ private SelectTSKMessage() {
         color = null;
     }
 
+    /**
+     * Gets the color associated with the TSK to be selected.
+     *
+     * @return the color associated with the TSK to be selected
+     */
     public Color getColor() {
         return color;
     }