private static ObjectMapper createObjectMapper() { om = new ObjectMapper(); final SimpleModule module = new SimpleModule("DiffMatch", new Version(1, 0, 0, null, "aerogear", "sync")); module.addDeserializer(DiffMatchPatchEdit.class, new EditDeserializer()); module.addSerializer(DiffMatchPatchEdit.class, new EditSerializer()); module.addDeserializer(DiffMatchPatchMessage.class, new PatchMessageDeserializer()); module.addSerializer(DiffMatchPatchMessage.class, new PatchMessageSerializer()); om.registerModule(module); return om; }