Index: applications/editors/josm/plugins/imagery_offset_db/src/iodb/CalibrationLayer.java
===================================================================
--- applications/editors/josm/plugins/imagery_offset_db/src/iodb/CalibrationLayer.java	(revision 32909)
+++ applications/editors/josm/plugins/imagery_offset_db/src/iodb/CalibrationLayer.java	(revision 32910)
@@ -185,5 +185,5 @@
      * A simple icon with a colored rectangle.
      */
-    class SingleColorIcon implements Icon {
+    static class SingleColorIcon implements Icon {
         private Color color;
 
@@ -213,5 +213,5 @@
      * uses {@link #visitBoundingBox} to pan and zoom to the calibration geometry.
      */
-    class ZoomToLayerAction extends AbstractAction {
+    static class ZoomToLayerAction extends AbstractAction {
         ZoomToLayerAction() {
             super(tr("Zoom to {0}", tr("layer"))); // to use translation from AutoScaleAction
Index: applications/editors/josm/plugins/imagery_offset_db/src/iodb/IODBReader.java
===================================================================
--- applications/editors/josm/plugins/imagery_offset_db/src/iodb/IODBReader.java	(revision 32909)
+++ applications/editors/josm/plugins/imagery_offset_db/src/iodb/IODBReader.java	(revision 32910)
@@ -176,5 +176,5 @@
      * and setters.
      */
-    private class IOFields {
+    private static class IOFields {
         public int id;
         public LatLon position;
Index: applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialog.java
===================================================================
--- applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialog.java	(revision 32909)
+++ applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialog.java	(revision 32910)
@@ -322,5 +322,5 @@
      * Opens a web browser with the wiki page in user's language.
      */
-    class HelpAction extends AbstractAction {
+    static class HelpAction extends AbstractAction {
 
         HelpAction() {
Index: applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialogButton.java
===================================================================
--- applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialogButton.java	(revision 32909)
+++ applications/editors/josm/plugins/imagery_offset_db/src/iodb/OffsetDialogButton.java	(revision 32910)
@@ -239,5 +239,5 @@
     }
 
-    private class DirectionIcon implements Icon {
+    private static class DirectionIcon implements Icon {
         private static final int SIZE = 10;