vpnInterfaceManager.setIdManager(idManager);
vpnManager.setVpnInterfaceManager(vpnInterfaceManager);
interfaceListener = new InterfaceChangeListener(dataBroker, vpnInterfaceManager);
vpnInterfaceManager.setIdManager(idManager);
vpnManager.setVpnInterfaceManager(vpnInterfaceManager);
interfaceListener = new InterfaceChangeListener(dataBroker, vpnInterfaceManager);