Index: /trunk/src/org/openstreetmap/josm/io/session/SessionReader.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/io/session/SessionReader.java	(revision 18974)
+++ /trunk/src/org/openstreetmap/josm/io/session/SessionReader.java	(revision 18975)
@@ -448,4 +448,7 @@
     }
 
+    /**
+     * A dependency of another layer
+     */
     public static class LayerDependency {
         private final Integer index;