Index: /trunk/src/org/openstreetmap/josm/data/imagery/WMTSTileSource.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/imagery/WMTSTileSource.java	(revision 11014)
+++ /trunk/src/org/openstreetmap/josm/data/imagery/WMTSTileSource.java	(revision 11015)
@@ -141,5 +141,5 @@
         private String baseUrl;
         private String style;
-        private Collection<String> tileMatrixSetLinks = new ArrayList<>();
+        private final Collection<String> tileMatrixSetLinks = new ArrayList<>();
 
         Layer(Layer l) {
@@ -225,5 +225,5 @@
 
     private final Map<String, String> headers = new ConcurrentHashMap<>();
-    private Collection<Layer> layers;
+    private final Collection<Layer> layers;
     private Layer currentLayer;
     private TileMatrixSet currentTileMatrixSet;
Index: /trunk/src/org/openstreetmap/josm/gui/datatransfer/TagTransferable.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/datatransfer/TagTransferable.java	(revision 11014)
+++ /trunk/src/org/openstreetmap/josm/gui/datatransfer/TagTransferable.java	(revision 11015)
@@ -17,5 +17,5 @@
  */
 public class TagTransferable implements Transferable {
-    private TagTransferData data;
+    private final TagTransferData data;
 
     /**
Index: /trunk/src/org/openstreetmap/josm/gui/layer/imagery/TileCoordinateConverter.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/imagery/TileCoordinateConverter.java	(revision 11014)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/imagery/TileCoordinateConverter.java	(revision 11015)
@@ -21,6 +21,6 @@
  */
 public class TileCoordinateConverter {
-    private MapView mapView;
-    private TileSourceDisplaySettings settings;
+    private final MapView mapView;
+    private final TileSourceDisplaySettings settings;
     private final TileSource tileSource;
 
Index: /trunk/src/org/openstreetmap/josm/gui/widgets/NativeFileChooser.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/widgets/NativeFileChooser.java	(revision 11014)
+++ /trunk/src/org/openstreetmap/josm/gui/widgets/NativeFileChooser.java	(revision 11015)
@@ -26,5 +26,5 @@
     private final FileDialog fileDialog;
     private FileFilter fileFilter;
-    private List<FileFilter> fileFilters = new ArrayList<>();
+    private final List<FileFilter> fileFilters = new ArrayList<>();
     private int selectionMode;