Add copyright headers

Change-Id: Iaeab9c0a3e73ed57bff7e6e846602dfd3d6fc7b4

Author: samtstern

admin/src/main/java/com/google/firebase/example/Main.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2017 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.firebase.example;
 
 import com.google.firebase.auth.FirebaseCredential;

database/src/main/java/com/google/firebase/example/Main.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2017 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.firebase.example;
 
 import com.google.firebase.database.*;
@@ -68,7 +84,6 @@ public Dinosaur(int height, int weight) {
     }
     // [END dinosaur_class]
 
-    // For: https://firebase-dot-devsite.googleplex.com/docs/database/server/save-data
     public void savingData() {
         // [START get_database_and_reference]
         final FirebaseDatabase database = FirebaseDatabase.getInstance();