Index: trunk/src/org/openstreetmap/josm/gui/layer/OsmDataLayer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/OsmDataLayer.java	(revision 12290)
+++ trunk/src/org/openstreetmap/josm/gui/layer/OsmDataLayer.java	(revision 12291)
@@ -158,7 +158,8 @@
      * Returns list of recently closed relations or null if none.
      * @return list of recently closed relations or <code>null</code> if none
+     * @since 12291 (signature)
      * @since 9668
      */
-    public ArrayList<Relation> getRecentRelations() {
+    public List<Relation> getRecentRelations() {
         ArrayList<Relation> list = new ArrayList<>(recentRelations.keySet());
         Collections.reverse(list);