Adding doc.go files for packages
diff --git a/openstack/identity/v2/tenants/doc.go b/openstack/identity/v2/tenants/doc.go
index 473a302..0c2d49d 100644
--- a/openstack/identity/v2/tenants/doc.go
+++ b/openstack/identity/v2/tenants/doc.go
@@ -1,7 +1,7 @@
-/*
-Package tenants contains API calls that query for information about tenants on an OpenStack deployment.
-
-See: http://developer.openstack.org/api-ref-identity-v2.html#identity-auth-v2
-And: http://developer.openstack.org/api-ref-identity-v2.html#admin-tenants
-*/
+// Package tenants provides information and interaction with the
+// tenants API resource for the OpenStack Identity service.
+//
+// See http://developer.openstack.org/api-ref-identity-v2.html#identity-auth-v2
+// and http://developer.openstack.org/api-ref-identity-v2.html#admin-tenants
+// for more information.
package tenants