Extend hinzugefuegt.

src/main/java/de/uniluebeck/mi/projmi6/model/Kasse.java

@@ -6,7 +6,7 @@ import javafx.beans.property.SimpleStringProperty;
 /**
  * Created by 627933 on 12.11.15.
  */
-public class Kasse {
+public class Kasse extends Version {
     private SimpleStringProperty adresse = new SimpleStringProperty(this, "adresse");
     private SimpleIntegerProperty kassenID = new SimpleIntegerProperty(this, "kassenID");
     private SimpleStringProperty name = new SimpleStringProperty(this, "name");