Ticket #250: [patch]delete_tmpfile_when_not_null.diff

src/org/openstreetmap/josm/actions/SaveActionBase.java

@@ -125 +125 @@
                                         copy(file, tmpFile);
                                 }
                                 OsmWriter.output(new FileOutputStream(file), new OsmWriter.All(layer.data, false));
-                                if (!Main.pref.getBoolean("save.keepbackup"))
+                                if (tmpFile != null && !Main.pref.getBoolean("save.keepbackup"))
                                         tmpFile.delete();
                         } else if (ExtensionFileFilter.filters[ExtensionFileFilter.CSV].acceptName(file.getPath())) {
                                 JOptionPane.showMessageDialog(Main.parent, tr("CSV output not supported yet."));