/** Send open event after open */
public void open() throws IOException, InterruptedException {
super.open();
super.append(openEvent()); // purposely using old append
listener.start(new String(tag));
}
/** Send close event before close */
public void close() throws IOException, InterruptedException {
super.append(closeEvent()); // purposely using old append
super.close();
listener.end(new String(tag));
}