Adding doc.go files for packages
diff --git a/openstack/identity/v3/endpoints/doc.go b/openstack/identity/v3/endpoints/doc.go
index 7d38ee3..8516394 100644
--- a/openstack/identity/v3/endpoints/doc.go
+++ b/openstack/identity/v3/endpoints/doc.go
@@ -1,3 +1,6 @@
-// Package endpoints queries and manages service endpoints.
-// Reference: http://developer.openstack.org/api-ref-identity-v3.html#endpoints-v3
+// Package endpoints provides information and interaction with the service
+// endpoints API resource in the OpenStack Identity service.
+//
+// For more information, see:
+// http://developer.openstack.org/api-ref-identity-v3.html#endpoints-v3
package endpoints