improve docblocks

src/Application/Model/Configuration.php

@@ -63,7 +63,7 @@ class Configuration
     /**
      * @return string|null
      */
-    public function getSmsSenderNumber()
+    public function getSmsSenderNumber(): ?string
     {
         /** @var string $number */
         $number = Registry::getConfig()->getConfigParam(self::SMS_SENDERNR);

src/Application/Model/Exceptions/abortSendingExceptionInterface.php

@@ -15,6 +15,8 @@ declare(strict_types=1);
 
 namespace D3\Linkmobility4OXID\Application\Model\Exceptions;
 
-interface abortSendingExceptionInterface extends \Throwable
+use Throwable;
+
+interface abortSendingExceptionInterface extends Throwable
 {
 }

src/Application/Model/MessageTypes/AbstractMessage.php

@@ -74,7 +74,7 @@ abstract class AbstractMessage
     /**
      * @return ResponseInterface|null
      */
-    public function getResponse()
+    public function getResponse(): ?ResponseInterface
     {
         return $this->response;
     }
@@ -94,7 +94,6 @@ abstract class AbstractMessage
     public function getRecipientsList(): string
     {
         $list = [];
-        /** @var Recipient $recipient */
         foreach ($this->recipients as $recipient) {
             $list[] = $recipient->get();
         }

src/Application/Model/MessageTypes/Sms.php

@@ -137,7 +137,7 @@ class Sms extends AbstractMessage
             return $response->isSuccessful();
         } catch (abortSendingExceptionInterface $e) {
             Registry::getLogger()->warning($e->getMessage());
-            // Oxid does not accept throwable interface only exceptions according by definition
+            // Oxid does not accept throwable interface only exceptions according to definition
             Registry::getUtilsView()->addErrorToDisplay($e->getMessage());
         } catch (GuzzleException $e) {
             Registry::getLogger()->warning($e->getMessage());

src/Application/Model/OrderRecipients.php

@@ -52,6 +52,7 @@ class OrderRecipients
                     /** @var string $countryId */
                     $countryId = $this->order->getFieldData(trim($countryIdFieldName));
                     $country->load($countryId);
+                    /** @var Recipient $recipient */
                     return oxNew(Recipient::class, $content, $country->getFieldData('oxisoalpha2'));
                 }
             } catch (NumberParseException $e) {

src/Application/Model/RequestFactory.php

@@ -25,7 +25,6 @@ class RequestFactory extends \D3\LinkmobilityClient\SMS\RequestFactory
     {
         $configuration = oxNew(Configuration::class);
 
-        /** @var SmsRequestInterface $request */
         $request = parent::getSmsRequest();
         $request->setTestMode($configuration->getTestMode())
             ->setSenderAddress(