close output streams after writing xml files.

src/net/java/sip/communicator/impl/configuration/ConfigurationServiceImpl.java

@@ -517,8 +517,10 @@ private void storeConfiguration(File file)
                                   newlyAddedProperties);
 
         //write the file.
+        OutputStream stream = new FileOutputStream(getConfigurationFile());
         XMLUtils.indentedWriteXML(
-            propertiesDocument, new FileOutputStream(getConfigurationFile()));
+            propertiesDocument, stream);
+        stream.close();
     }
 
     /**

src/net/java/sip/communicator/impl/contactlist/MclStorageManager.java

@@ -350,8 +350,10 @@ private void storeContactList0() throws IOException
                      + isModified);
         if(isStarted())
         {
+            OutputStream stream = new FileOutputStream(contactlistFile);
             XMLUtils.indentedWriteXML(contactListDocument
-                                      , new FileOutputStream(contactlistFile));
+                                      , stream);
+            stream.close();
         }
     }