diff --git a/juju/filter.go b/juju/filter.go
index <HASH>..<HASH> 100644
--- a/juju/filter.go
+++ b/juju/filter.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// Package juju provide utilities functions for handle with juju .
 package juju
 
 import (
added a doc for juju package