Adding doc.go files for packages
diff --git a/openstack/identity/v2/extensions/doc.go b/openstack/identity/v2/extensions/doc.go
new file mode 100644
index 0000000..791e4e3
--- /dev/null
+++ b/openstack/identity/v2/extensions/doc.go
@@ -0,0 +1,3 @@
+// Package extensions provides information and interaction with the
+// different extensions available for the OpenStack Identity service.
+package extensions
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
diff --git a/openstack/identity/v2/tokens/doc.go b/openstack/identity/v2/tokens/doc.go
index d26f642..31cacc5 100644
--- a/openstack/identity/v2/tokens/doc.go
+++ b/openstack/identity/v2/tokens/doc.go
@@ -1,6 +1,5 @@
-/*
-Package tokens contains functions that issue and manipulate identity tokens.
-
-Reference: http://developer.openstack.org/api-ref-identity-v2.html#identity-auth-v2
-*/
+// Package tokens provides information and interaction with the token API
+// resource for the OpenStack Identity service.
+// For more information, see:
+// http://developer.openstack.org/api-ref-identity-v2.html#identity-auth-v2
package tokens