prop.load(reader);
        properties = prop;
    }

    @Override
    public synchronized void loadFromXML(final InputStream in) throws IOException, InvalidPropertiesFormatException {
        final Properties prop = new Properties();
        lastModified = propertiesFile.lastModified();
        prop.loadFromXML(in);
        properties = prop;
    }

    @Override
    public Enumeration<?> propertyNames() {