Warning fixes.

workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/Sentence.java

@@ -68,7 +68,7 @@ public final class Sentence {
         sb.append(String.format(Locale.US, "%s,%d,%s,%.6f,%.6f,%.1f", callSign, id, timeString, latitude, longitude,
                 altitude));
         for (String s : extras) {
-            sb.append(",");
+            sb.append(',');
             sb.append(s);
         }
         final String basic = sb.toString();

workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/habitat/IHabitatRestApi.java

@@ -22,14 +22,14 @@ public interface IHabitatRestApi {
 
     @Path("/habitat/_design/payload_telemetry/_update/add_listener/{doc_id}")
     @PUT
-    public String updateListener(@PathParam("doc_id") String docId, String json);
+    String updateListener(@PathParam("doc_id") String docId, String json);
 
     @Path("/_uuids")
     @GET
-    public UuidsList getUuids(@QueryParam("count") int count);
+    UuidsList getUuids(@QueryParam("count") int count);
     
     @Path("/habitat/{doc_id}")
     @PUT
-    public UploadResult uploadDocument(@PathParam("doc_id") String docId, String document);
+    UploadResult uploadDocument(@PathParam("doc_id") String docId, String document);
 
 }

workspace/ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/ttn/TtnMessageMetaData.java

@@ -26,7 +26,7 @@ public final class TtnMessageMetaData {
      * Constructor.
      * 
      * @param time the time
-     * @param gws list of gateways
+     * @param gateways list of gateways
      */
     public TtnMessageMetaData(String time, List<TtnMessageGateway> gateways) {
         this();