diff --git a/Structural/Facade/BiosInterface.php b/Structural/Facade/BiosInterface.php
index 823af04..8f1aa01 100644
--- a/Structural/Facade/BiosInterface.php
+++ b/Structural/Facade/BiosInterface.php
@@ -3,29 +3,29 @@
 namespace DesignPatterns\Structural\Facade;
 
 /**
- * Class BiosInterface.
+ * Interface BiosInterface.
  */
 interface BiosInterface
 {
     /**
-     * execute the BIOS.
+     * Execute the BIOS.
      */
     public function execute();
 
     /**
-     * wait for halt.
+     * Wait for halt.
      */
     public function waitForKeyPress();
 
     /**
-     * launches the OS.
+     * Launches the OS.
      *
      * @param OsInterface $os
      */
     public function launch(OsInterface $os);
 
     /**
-     * power down BIOS.
+     * Power down BIOS.
      */
     public function powerDown();
 }
diff --git a/Structural/Facade/Facade.php b/Structural/Facade/Facade.php
index 50c665d..43d1bcb 100644
--- a/Structural/Facade/Facade.php
+++ b/Structural/Facade/Facade.php
@@ -3,7 +3,7 @@
 namespace DesignPatterns\Structural\Facade;
 
 /**
- *
+ * Class Facade.
  */
 class Facade
 {
@@ -31,7 +31,7 @@ class Facade
     }
 
     /**
-     * turn on the system.
+     * Turn on the system.
      */
     public function turnOn()
     {
@@ -41,7 +41,7 @@ class Facade
     }
 
     /**
-     * turn off the system.
+     * Turn off the system.
      */
     public function turnOff()
     {
diff --git a/Structural/Facade/OsInterface.php b/Structural/Facade/OsInterface.php
index 8394fd4..d8171e4 100644
--- a/Structural/Facade/OsInterface.php
+++ b/Structural/Facade/OsInterface.php
@@ -3,12 +3,12 @@
 namespace DesignPatterns\Structural\Facade;
 
 /**
- * Class OsInterface.
+ * Interface OsInterface.
  */
 interface OsInterface
 {
     /**
-     * halt the OS.
+     * Halt the OS.
      */
     public function halt();
 }
diff --git a/Structural/Facade/Tests/FacadeTest.php b/Structural/Facade/Tests/FacadeTest.php
index e6038a0..0f1ea10 100644
--- a/Structural/Facade/Tests/FacadeTest.php
+++ b/Structural/Facade/Tests/FacadeTest.php
@@ -34,6 +34,8 @@ class FacadeTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
+     * @param Computer $facade
+     * @param OsInterface $os
      * @dataProvider getComputer
      */
     public function testComputerOn(Computer $facade, OsInterface $os)