public function init()
    {
        if (count($this->buckets))
        {
            foreach ($this->buckets as $alias => $bucket) 
            {
                $this->_buckets[$alias] = new BucketFileSystem(
                    $bucket['basePath'],
                    $bucket['baseUrl'],
                    isset($bucket['filePermission']) ? $bucket['filePermission'] : 0777
                );
            }
        }
    }