public class TestHandler {
    @Execute
    public void execute() {
        IEclipsePreferences preferences = ConfigurationScope.INSTANCE.getNode("myapp");
        Preferences node1 = preferences.node("node1");
        Preferences node2 = preferences.node("node2");
        node1.put("h1", "Hello");
        node1.put("h2", "Hello again");
        node2.put("h1", "Moin");

        try {
            // forces the application to save the preferences
            preferences.flush();
        } catch (BackingStoreException e2) {
            e2.printStackTrace();
        }
    }
}

public class Test2Handler {
    @Execute
    public void execute() {
        IEclipsePreferences preferences = ConfigurationScope.INSTANCE.getNode("myapp");
        Preferences sub1 = preferences.node("node1");
        Preferences sub2 = preferences.node("node2");
        System.out.println(sub1.get("h1", "default"));
        System.out.println(sub1.get("h2", "default"));
        System.out.println(sub2.get("h1", "default"));
    }

}