Index: trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java	(revision 11021)
+++ trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java	(revision 11022)
@@ -171,5 +171,7 @@
 
     /**
-     * This is the list of layers we manage. The list is unmodifyable It is only changed in the EDT.
+     * This is the list of layers we manage. The list is unmodifyable. That way, read access does not need to be synchronized.
+     *
+     * It is only changed in the EDT.
      * @see LayerManager#updateLayers(Consumer)
      */