Import code from internal repository to git

java/com/google/domain/registry/model/contact/ContactPhoneNumber.java

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+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.domain.registry.model.contact;
+
+import com.google.domain.registry.model.eppcommon.PhoneNumber;
+
+import com.googlecode.objectify.annotation.Embed;
+
+/**
+ * EPP Contact Phone Number
+ * <p>
+ * This class is embedded inside a {@link ContactResource} hold the phone number of an EPP contact.
+ * The fields are all defined in the parent class {@link PhoneNumber}, but the subclass is still
+ * necessary to pick up the contact namespace.
+ *
+ * @see ContactResource
+ */
+@Embed
+public class ContactPhoneNumber extends PhoneNumber {
+
+  /** Builder for {@link ContactPhoneNumber}. */
+  public static class Builder extends PhoneNumber.Builder<ContactPhoneNumber> {}
+}