Avoid issues in case export directory doesn't exist

public/typo3conf/ext/ep_products/Classes/Command/ExportCommandController.php

@@ -91,8 +91,8 @@ class ExportCommandController extends Command
             '%s/fileadmin/reseller',
             \TYPO3\CMS\Core\Core\Environment::getPublicPath()
         );
-        if (!mkdir($destinationFolder, 0755) && !is_dir($destinationFolder)) {
-            throw new \RuntimeException(sprintf('Directory "%s" was not created', $destinationFolder));
+        if (!file_exists($destinationFolder)) {
+            mkdir($destinationFolder, 0755);
         }
         foreach ($resellers as $reseller) {
             /** @var Reseller $reseller */