diff --git a/lib/Thumbor/Url/BuilderFactory.php b/lib/Thumbor/Url/BuilderFactory.php
index 429d649..8ab162b 100644
--- a/lib/Thumbor/Url/BuilderFactory.php
+++ b/lib/Thumbor/Url/BuilderFactory.php
@@ -24,17 +24,30 @@ class BuilderFactory
     private $server;
     private $secret;
 
+    /**
+     * @param string $server
+     * @param string|null $secret
+     * @return BuilderFactory
+     */
     public static function construct($server, $secret=null)
     {
         return new self($server, $secret);
     }
 
+    /**
+     * @param string $server
+     * @param string|null $secret
+     */
     public function __construct($server, $secret=null)
     {
         $this->server = $server;
         $this->secret = $secret;
     }
 
+    /**
+     * @param string $original
+     * @return Builder
+     */
     public function url($original)
     {
         return Builder::construct($this->server, $this->secret, $original);