Index: trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java	(revision 17508)
+++ trunk/src/org/openstreetmap/josm/data/cache/JCSCachedTileLoaderJob.java	(revision 17509)
@@ -188,6 +188,6 @@
      * Simple implementation. All errors should be cached as empty. Though some JDK (JDK8 on Windows for example)
      * doesn't return 4xx error codes, instead they do throw an FileNotFoundException or IOException
-     * @param responseCode
-     * @param headerFields
+     * @param headerFields headers sent by server
+     * @param responseCode http status code
      *
      * @return true if we should put empty object into cache, regardless of what remote resource has returned
Index: trunk/src/org/openstreetmap/josm/data/imagery/TMSCachedTileLoaderJob.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/imagery/TMSCachedTileLoaderJob.java	(revision 17508)
+++ trunk/src/org/openstreetmap/josm/data/imagery/TMSCachedTileLoaderJob.java	(revision 17509)
@@ -136,5 +136,5 @@
         }
         if (isNotImage(headers, statusCode)) {
-            String message = detectErrorMessage( new String(content, StandardCharsets.UTF_8));
+            String message = detectErrorMessage(new String(content, StandardCharsets.UTF_8));
             if (message != null && !message.isEmpty()) {
                 tile.setError(message);
@@ -148,5 +148,5 @@
         if (statusCode == 200 && headers.containsKey("Content-Type") && !headers.get("Content-Type").isEmpty()) {
             String contentType = headers.get("Content-Type").stream().findAny().get();
-            if (contentType !=null && !contentType.startsWith("image")) {
+            if (contentType != null && !contentType.startsWith("image")) {
                 Logging.warn("Image not returned for tile: " + url + " content type was: " + contentType);
                 // not an image - do not store response in cache, so next time it will be queried again from the server
Index: trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java	(revision 17508)
+++ trunk/src/org/openstreetmap/josm/gui/layer/AbstractTileSourceLayer.java	(revision 17509)
@@ -664,5 +664,6 @@
                 Math.pow(2d, ZOOM_OFFSET.get()) * visibileTiles // use offset to decide, how many tiles are visible
                 * 8);
-        Logging.info("AbstractTileSourceLayer: estimated tiles proccessed on current zoom level: {0}, estimated cache size: {1}", visibileTiles, ret);
+        Logging.info("AbstractTileSourceLayer: estimated tiles proccessed on current zoom level: {0}, estimated cache size: {1}",
+                visibileTiles, ret);
         return ret;
     }
@@ -1598,5 +1599,5 @@
             int[] otherZooms = {1, 2, -1, -2, -3, -4, -5};
 
-            for(int otherZoom: otherZooms) {
+            for (int otherZoom: otherZooms) {
                 missedTiles = tryLoadFromDifferentZoom(g, displayZoomLevel, missedTiles, otherZoom);
                 if (missedTiles.isEmpty()) {