Fix phpstan issues

src/Bundle/ChillDocGeneratorBundle/Context/DocGeneratorContextInterface.php

@@ -16,15 +16,17 @@ use Chill\DocStoreBundle\Entity\StoredObject;
 
 /**
  * Interface for context for document generation.
+ *
+ * @template T of object
  */
 interface DocGeneratorContextInterface
 {
     /**
      * Get the data that will be injected to the generated document.
      *
-     * @param mixed $entity
+     * @param T $entity
      */
-    public function getData(DocGeneratorTemplate $template, $entity, array $contextGenerationData = []): array;
+    public function getData(DocGeneratorTemplate $template, object $entity, array $contextGenerationData = []): array;
 
     public function getDescription(): string;
 
@@ -34,5 +36,8 @@ interface DocGeneratorContextInterface
 
     public function getName(): string;
 
+    /**
+     * @param T $entity
+     */
     public function storeGenerated(DocGeneratorTemplate $template, StoredObject $storedObject, object $entity, array $contextGenerationData): void;
 }