17e222
@@ -290,7 +290,9 @@
public class FileIdempotentRepository extends ServiceSupport implements Idempote
         if (!fileStore.exists()) {
             LOG.debug("Creating filestore: {}", fileStore);
             File parent = fileStore.getParentFile();
-            parent.mkdirs();
+            if (parent != null) {
+                parent.mkdirs();
+            }
             boolean created = FileUtil.createNewFile(fileStore);
             if (!created) {
                 throw new IOException("Cannot create filestore: " + fileStore);
