generate document with relatorio: config and driver

src/Bundle/ChillDocGeneratorBundle/GeneratorDriver/DriverInterface.php

@@ -1,12 +1,22 @@
 <?php
 
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
 namespace Chill\DocGeneratorBundle\GeneratorDriver;
 
 interface DriverInterface
 {
     /**
      * @param resource $template
+     *
      * @return resource
      */
-    public function generateFromResource($template, string $resourceType, array $data, string $templateName = null);
+    public function generateFromResource($template, string $resourceType, array $data, ?string $templateName = null);
 }