Index: applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java
===================================================================
--- applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java	(revision 30264)
+++ applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java	(revision 30532)
@@ -137,5 +137,5 @@
 
         final MouseListener relationMouseAdapter = new ChosenRelationMouseAdapter();
-        final JComboBox roleBox = new JComboBox();
+        final JComboBox<String> roleBox = new JComboBox<>();
         roleBoxModel = new RoleComboBoxModel(roleBox);
         roleBox.setModel(roleBoxModel);
@@ -620,15 +620,15 @@
             setEnabled(newRelation != null);
         }
-        }
+    }
         
-    private class RoleComboBoxModel extends AbstractListModel implements ComboBoxModel {
+    private class RoleComboBoxModel extends AbstractListModel<String> implements ComboBoxModel<String> {
         private List<String> roles = new ArrayList<String>();
         private int selectedIndex = -1;
-        private JComboBox combobox;
+        private JComboBox<String> combobox;
         private String membersRole;
         private final String EMPTY_ROLE = tr("<empty>");
         private final String ANOTHER_ROLE = tr("another...");
 
-        public RoleComboBoxModel( JComboBox combobox ) {
+        public RoleComboBoxModel( JComboBox<String> combobox ) {
             super();
             this.combobox = combobox;
@@ -708,5 +708,5 @@
         }
 
-        public Object getElementAt( int index ) {
+        public String getElementAt( int index ) {
             return getRole(index);
         }
Index: applications/editors/josm/plugins/reltoolbox/src/relcontext/actions/FindRelationAction.java
===================================================================
--- applications/editors/josm/plugins/reltoolbox/src/relcontext/actions/FindRelationAction.java	(revision 30264)
+++ applications/editors/josm/plugins/reltoolbox/src/relcontext/actions/FindRelationAction.java	(revision 30532)
@@ -37,5 +37,5 @@
         panel.add(searchField, BorderLayout.NORTH);
         final FindRelationListModel relationsData = new FindRelationListModel();
-        final JList relationsList = new JList(relationsData);
+        final JList<Relation> relationsList = new JList<>(relationsData);
         relationsList.setSelectionModel(relationsData.getSelectionModel());
         relationsList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
@@ -167,5 +167,5 @@
      * I admit, some of it was copypasted from {@link org.openstreetmap.josm.gui.dialogs.RelationListDialog.RelationListModel}.
      */
-    protected class FindRelationListModel extends AbstractListModel {
+    protected class FindRelationListModel extends AbstractListModel<Relation> {
         private final ArrayList<Relation> relations = new ArrayList<Relation>();
         private DefaultListSelectionModel selectionModel;
@@ -184,19 +184,17 @@
         }
 
-        public Relation getRelation( int idx ) {
-            return relations.get(idx);
-        }
-
+        @Override
         public int getSize() {
             return relations.size();
         }
 
-        public Object getElementAt( int index ) {
-            return getRelation(index);
+        @Override
+        public Relation getElementAt( int index ) {
+            return relations.get(index);
         }
 
         public void setRelations(Collection<Relation> relations) {
             int selectedIndex = selectionModel.getMinSelectionIndex();
-            Relation sel =  selectedIndex < 0 ? null : getRelation(selectedIndex);
+            Relation sel =  selectedIndex < 0 ? null : getElementAt(selectedIndex);
             
             this.relations.clear();