private void writeXML(String xml) {
        String resourceName = System.getProperty(CONFIG_FILENAME_KEY);
        if (resourceName == null) {
            return;
        } else {
            URL rUrl = ClassLoader.getSystemResource(resourceName);
            if (rUrl != null) {
                File file = new File(rUrl.getFile());
                if (file != null && file.canWrite()) {
                    FileWriter fw = null;
                    try {
                        fw = new FileWriter(file);
                        fw.write(xml);
                        fw.close();
                    } catch (IOException ioe) {
                        //@TODO log it?
                    } finally {
                        try {
                            fw.close();
                        } catch (IOException ioee) {
                            ; //Nothing to do.
                        }
                        fw = null;
                        file = null;
                    }
                }
            }
        }
    }