Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLoaderListener.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLoaderListener.java	(revision 32682)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/interfaces/TileLoaderListener.java	(revision 32722)
@@ -4,4 +4,8 @@
 import org.openstreetmap.gui.jmapviewer.Tile;
 
+/**
+ * This listener listens to successful tile loads.
+ */
+@FunctionalInterface
 public interface TileLoaderListener {