diff --git a/src/CPEKU.php b/src/CPEKU.php
index 21b0a22..4c92bb0 100644
--- a/src/CPEKU.php
+++ b/src/CPEKU.php
@@ -2,15 +2,18 @@
 
 class CPEKU
 {
-	
+
 	public function __construct(){}
-	
+
 	public function get_Name(){}
-	
+
 	public function set_Name(){}
-	
+
+	/**
+	 * @return string
+	 */
 	public function get_OID(){}
-	
+
 	public function set_OID(){}
-	
+
 }
diff --git a/src/CPEKUs.php b/src/CPEKUs.php
index abd536f..8c765ef 100644
--- a/src/CPEKUs.php
+++ b/src/CPEKUs.php
@@ -2,17 +2,25 @@
 
 class CPEKUs
 {
-	
+
 	public function __construct(){}
-	
+
 	public function Add(){}
-	
+
+	/**
+	 * @return int
+	 */
 	public function get_Count(){}
-	
-	public function get_Item(){}
-	
+
+	/**
+	 * @param   int  $index
+	 *
+	 * @return \CPEKU
+	 */
+	public function get_Item(int $index){}
+
 	public function Clear(){}
-	
+
 	public function Remove(){}
-	
+
 }
diff --git a/src/CPExtendedKeyUsage.php b/src/CPExtendedKeyUsage.php
index b687756..f6eb752 100644
--- a/src/CPExtendedKeyUsage.php
+++ b/src/CPExtendedKeyUsage.php
@@ -2,13 +2,16 @@
 
 class CPExtendedKeyUsage
 {
-	
+
 	public function __construct(){}
-	
+
 	public function get_IsPresent(){}
-	
+
 	public function get_IsCritical(){}
-	
+
+	/**
+	 * @return \CPEKUs
+	 */
 	public function get_EKUs(){}
-	
+
 }
diff --git a/src/CPOID.php b/src/CPOID.php
index b7efc11..38f9ebd 100644
--- a/src/CPOID.php
+++ b/src/CPOID.php
@@ -2,13 +2,27 @@
 
 class CPOID
 {
-	
-	public function __construct(){}
-	
-	public function get_Value(){}
-	
-	public function set_Value(){}
-	
-	public function get_FriendlyName(){}
-	
+
+	public function __construct()
+	{
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_Value()
+	{
+	}
+
+	public function set_Value()
+	{
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_FriendlyName()
+	{
+	}
+
 }
diff --git a/src/CPPublicKey.php b/src/CPPublicKey.php
index dd0a76a..f8fbbbf 100644
--- a/src/CPPublicKey.php
+++ b/src/CPPublicKey.php
@@ -2,15 +2,18 @@
 
 class CPPublicKey
 {
-	
+
 	public function __construct(){}
-	
+
+	/**
+	 * @return \CPOID
+	 */
 	public function get_Algorithm(){}
-	
+
 	public function get_Length(){}
-	
+
 	public function get_EncodedKey(){}
-	
+
 	public function get_EncodedParameters(){}
-	
+
 }