Index: applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java
===================================================================
--- applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java	(revision 30737)
+++ applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java	(revision 30738)
@@ -25,4 +25,5 @@
 import javax.xml.xpath.XPathFactory;
 
+import org.openstreetmap.josm.Main;
 import org.openstreetmap.josm.data.coor.LatLon;
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
@@ -116,8 +117,7 @@
                 connection.setDoOutput(true);
 
-                OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
-                out.write("articles=" + encodeURL(Utils.join(",", articleNames)));
-                out.close();
-
+                try (OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8")) {
+                	out.write("articles=" + encodeURL(Utils.join(",", articleNames)));
+                }
 
                 final Scanner scanner = new Scanner(connection.getInputStream(), "UTF-8").useDelimiter("\n");
@@ -129,5 +129,5 @@
                         status.put(x[0], "1".equals(x[1]));
                     } else {
-                        System.err.println("Unknown element " + line);
+                        Main.error("Unknown element " + line);
                     }
                 }