updates

src/main/java/lodge/datamodel/DuplicateObjectException.java

@@ -0,0 +1,16 @@
+/**
+ * license: GPLv3
+ * lodge.reservationsystem
+*/
+package lodge.datamodel;
+
+public class DuplicateObjectException extends RuntimeException {
+    public DuplicateObjectException() {
+        super();
+    }
+
+    public DuplicateObjectException(String message) {
+        super(message);
+    }
+
+}