public XmlConfig(String configFileName){
try {
DOMParser parser = new DOMParser();
URL url = createURL(configFileName);
parser.setErrorStream(System.err);
parser.showWarnings(true);
parser.parse(url);
configDoc = parser.getDocument();
rootConfigNode = (XMLNode) configDoc;
} catch (Exception e) {
System.out.println(e.toString());