Index: trunk/test/unit/org/openstreetmap/josm/data/osm/RelationTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/osm/RelationTest.java	(revision 1806)
+++ trunk/test/unit/org/openstreetmap/josm/data/osm/RelationTest.java	(revision 1806)
@@ -0,0 +1,20 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.data.osm;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class RelationTest {
+    @Test(expected=NullPointerException.class)
+    public void createNewRelation() {
+        new Relation(null);
+    }
+
+    @Test
+    public void equalSemenaticsToNull() {
+        Relation relation = new Relation();
+        assertFalse(relation.hasEqualTechnicalAttributes(null));
+    }
+
+}