@@ -0,0 +1,245 @@
+package at.ac.tuwien.inso.exception;%0A%0Apublic class RelationNotfoundException extends RuntimeException %7B%0A%0A    public RelationNotfoundException() %7B%0A        super();%0A    %7D%0A%0A    public RelationNotfoundException(String s) %7B%0A        super(s);%0A    %7D%0A%7D%0A

Add RelationNotFoundException