docs: protected void loadProperties(String filename) {
  		ClassLoader thclassLoader = Thread.currentThread().getContextClassLoader();
  		if (thclassLoader != null){
  			URL url = thclassLoader.getResource(filename);
  			if (url != null){
  				try {
  					this.setXMLProperties(url.openStream(), null);
  				} catch (Exception e) {
  					// do nothing
  				} 
  			}
  		}
  	}