// define a module
SimpleModule module = new SimpleModule("Default Serializer",
new Version(0, 1, 1, "FINAL"));
// add various serializers to the module
// add default (all-pass) serializer for all rumen specific data types
module.addSerializer(DataType.class, new DefaultRumenSerializer());
// add a serializer to use object.toString() while serializing
module.addSerializer(ID.class, new ObjectStringSerializer<ID>());
// register the module with the object-mapper
mapper.registerModule(module);