Index: applications/editors/josm/plugins/mapdust/src/org/openstreetmap/josm/plugins/mapdust/util/http/HttpConnector.java
===================================================================
--- applications/editors/josm/plugins/mapdust/src/org/openstreetmap/josm/plugins/mapdust/util/http/HttpConnector.java	(revision 30737)
+++ applications/editors/josm/plugins/mapdust/src/org/openstreetmap/josm/plugins/mapdust/util/http/HttpConnector.java	(revision 30738)
@@ -38,4 +38,5 @@
 import java.net.URLEncoder;
 import java.util.Map;
+
 import org.openstreetmap.josm.plugins.mapdust.util.retry.RetryAgent;
 import org.openstreetmap.josm.plugins.mapdust.util.retry.RetrySetup;
@@ -160,9 +161,8 @@
                 /* 3: write content */
                 if (sbEncodeParameters.length() > 0) {
-                    OutputStreamWriter out =
-                            new OutputStreamWriter(connection.getOutputStream());
-
-                    out.write(sbEncodeParameters.toString());
-                    out.close();
+                    try (OutputStreamWriter out =
+                            new OutputStreamWriter(connection.getOutputStream())) {
+                        out.write(sbEncodeParameters.toString());
+                    }
                 }