Adding doc.go files for packages
diff --git a/rackspace/identity/v2/extensions/doc.go b/rackspace/identity/v2/extensions/doc.go
new file mode 100644
index 0000000..b02a95b
--- /dev/null
+++ b/rackspace/identity/v2/extensions/doc.go
@@ -0,0 +1,3 @@
+// Package extensions provides information and interaction with the all the
+// extensions available for the Rackspace Identity service.
+package extensions
diff --git a/rackspace/identity/v2/tenants/doc.go b/rackspace/identity/v2/tenants/doc.go
new file mode 100644
index 0000000..c1825c2
--- /dev/null
+++ b/rackspace/identity/v2/tenants/doc.go
@@ -0,0 +1,3 @@
+// Package tenants provides information and interaction with the tenant
+// API resource for the Rackspace Identity service.
+package tenants
diff --git a/rackspace/identity/v2/tokens/doc.go b/rackspace/identity/v2/tokens/doc.go
new file mode 100644
index 0000000..44043e5
--- /dev/null
+++ b/rackspace/identity/v2/tokens/doc.go
@@ -0,0 +1,3 @@
+// Package tokens provides information and interaction with the token
+// API resource for the Rackspace Identity service.
+package tokens