diff --git a/src/SagUserUtils.php b/src/SagUserUtils.php
index <HASH>..<HASH> 100644
--- a/src/SagUserUtils.php
+++ b/src/SagUserUtils.php
@@ -1,6 +1,24 @@
 <?php
-require('Sag.php');
-
+/*
+   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.
+*/
+
+require_once('Sag.php');
+
+/**
+ * Utilities for creating, managing, and removing users in CouchDB's _users
+ * database.
+ */
 class SagUserUtils
 {
   private static $USER_ID_PREFIX = 'org.couchdb.user';
Licensing and class doc comments.