diff --git a/php/Stack/apt.php b/php/Stack/apt.php
index fc4f72ea..e8f8bc95 100644
--- a/php/Stack/apt.php
+++ b/php/Stack/apt.php
@@ -12,29 +12,13 @@ class APT extends PKG_MANAGER {
 
 	function __construct($data=array())
 	{
+		parent::__construct($this->stack_os_scope);
 		$this->pkg = $data;
 
-		print_r($this->pkg);  //debugging purpose only
+		//print_r($this->pkg);  //debugging purpose only
 
 	}
 
-	public function validate_stack_type($stacktype){
-		$os_type = EE_CLI\Utils\get_OS();
-		$flag = false;
-		foreach ($this->stack_os_scope as $value) {
-
-				if ($value == trim($os_type['DISTRIB_ID'])) {
-					$flag = true;
-					print_r($os_type['DISTRIB_ID']);
-					return $flag;
-				}
-			}
-
-		if (!$flag) die("Configuration doesnot match with system status \n");
-		}
-
-
-
 	public function install() {
 
 		$process = EE_CLI\Process::create( "sudo apt-get install {$this->pkg['package_name']}" );
diff --git a/php/Stack/package_manager.php b/php/Stack/package_manager.php
index 78aefbef..b79f7e6c 100644
--- a/php/Stack/package_manager.php
+++ b/php/Stack/package_manager.php
@@ -12,7 +12,25 @@ abstract class PKG_MANAGER {
 
 	protected $stack_os_scope ;
 
-	public function __construct() {}
+	function __construct($stack=array()) {
+
+		$this->stack_os_scope = $stack;
+	}
+
+	function validate_stack_type($stacktype){
+		$os_type = EE_CLI\Utils\get_OS();
+		$flag = false;
+		foreach ($this->stack_os_scope as $value) {
+
+			if ($value == trim($os_type['DISTRIB_ID'])) {
+				$flag = true;
+				print_r($os_type['DISTRIB_ID']);
+				return $flag;
+			}
+		}
+
+		if (!$flag) die("Configuration does not match with system status \n");
+	}
 
 
 }