diff --git a/src/Builder/BuilderAbstract.php b/src/Builder/BuilderAbstract.php
index <HASH>..<HASH> 100644
--- a/src/Builder/BuilderAbstract.php
+++ b/src/Builder/BuilderAbstract.php
@@ -6,13 +6,18 @@ abstract class BuilderAbstract implements BuilderInterface
 {
 
     /**
-     * Description.
+     * Build the command string to be executed.
      *
-     * @return
+     * @return string
      */
     abstract public function build($args);
 
 
+    /**
+     * Wraps a string in double quotes.
+     *
+     * @return string
+     */
     public function quotify($text)
     {
         return '"' . $text . '"';
diff --git a/src/Builder/BuilderInterface.php b/src/Builder/BuilderInterface.php
index <HASH>..<HASH> 100644
--- a/src/Builder/BuilderInterface.php
+++ b/src/Builder/BuilderInterface.php
@@ -5,9 +5,9 @@ namespace BryanCrowe\Growl\Builder;
 interface BuilderInterface
 {
     /**
-     * Description.
+     * Build the command string to be executed.
      *
-     * @return
+     * @return string
      */
     public function build($args);
 }
Add docblocks to BuilderAbstract and BuilderInterface