google-cloud-iot overview (2.2.1)

 // This snippet has been automatically generated for illustrative purposes only.
 // It may require modifications to work in your environment.
 try (DeviceManagerClient deviceManagerClient = DeviceManagerClient.create()) {
   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
   DeviceRegistry deviceRegistry = DeviceRegistry.newBuilder().build();
   DeviceRegistry response = deviceManagerClient.createDeviceRegistry(parent, deviceRegistry);
 }