public void testWritingRouteConverterExtensions() throws IOException, JAXBException {
slash.navigation.gpx.routecatalog10.ObjectFactory rcFactory = new slash.navigation.gpx.routecatalog10.ObjectFactory();
UserextensionType userExtensionType = rcFactory.createUserextensionType();
userExtensionType.setFirstname("FIRST");
slash.navigation.gpx.binding11.ObjectFactory gpxFactory = new slash.navigation.gpx.binding11.ObjectFactory();
ExtensionsType extensionsType = gpxFactory.createExtensionsType();
extensionsType.getAny().add(userExtensionType);
GpxType gpx = gpxFactory.createGpxType();
gpx.setCreator("CREATOR");
gpx.setExtensions(extensionsType);
assertNotNull(gpx);
StringWriter writer = new StringWriter();