Fix for code smells

Gateway/Response/VaultDetailsHandler.php

@@ -133,11 +133,15 @@ class VaultDetailsHandler implements HandlerInterface
      */
     private function getVaultPaymentToken(array $response, $payment)
     {
-        $paymentToken = null;
 
-        if (!empty($response['additionalData'])) {
+        if (empty($response['additionalData'])) {
+            return null;
+        }
+
         $additionalData = $response['additionalData'];
 
+        $paymentToken = null;
+
         foreach (self::ADDITIONAL_DATA_ERRORS as $key => $errorMsg) {
             if (empty($additionalData[$key])) {
                 $this->adyenLogger->error($errorMsg);
@@ -188,7 +192,6 @@ class VaultDetailsHandler implements HandlerInterface
         } catch (\Exception $e) {
             $this->adyenLogger->error(print_r($e, true));
         }
-        }
 
         return $paymentToken;
     }
@@ -198,8 +201,10 @@ class VaultDetailsHandler implements HandlerInterface
      * @return string
      * @throws \Exception
      */
-    private function getExpirationDate($expirationDate)
-    {
+    private
+    function getExpirationDate(
+        $expirationDate
+    ) {
         $expirationDate = explode('/', $expirationDate);
 
         //add leading zero to month
@@ -226,8 +231,10 @@ class VaultDetailsHandler implements HandlerInterface
      * @param InfoInterface $payment
      * @return OrderPaymentExtensionInterface
      */
-    private function getExtensionAttributes(InfoInterface $payment)
-    {
+    private
+    function getExtensionAttributes(
+        InfoInterface $payment
+    ) {
         $extensionAttributes = $payment->getExtensionAttributes();
         if (null === $extensionAttributes) {
             $extensionAttributes = $this->paymentExtensionFactory->create();