bw.newLine(); bw.write("<!DOCTYPE preferences SYSTEM " + "\"http:
    private void writeHeader() throws BackingStoreException, IOException {        bw.write("<?xml version=\"1.0\"?>");        bw.newLine();        bw.newLine();        bw.write("<!-- GNU Classpath java.util.prefs Preferences ");        if (prefs.isUserNode()) {            bw.write("user");        } else {            bw.write("system");        }        // root node?        if (prefs.parent() == null) {            bw.write(" root");        }        if (subtree) {            bw.write(" tree");        } else {            bw.write(" node");        }        // no root?        if (prefs.parent() != null) {            bw.newLine();            bw.write("     '");            bw.write(prefs.absolutePath());            bw.write('\'');            bw.newLine();        }        bw.write(" -->");        bw.newLine();        bw.newLine();    }