Add missing whitespace

Change-Id: I9061fb18ad808e51afa8eb0946d42d346afcd7c9
diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/ExportReviewNotes.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/ExportReviewNotes.java
index d1cbb9a..bcb8fe6 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/ExportReviewNotes.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/ExportReviewNotes.java
@@ -133,7 +133,7 @@
   private class Worker extends Thread {
     @Override
     public void run() {
-      try (ReviewDb db = database.open()){
+      try (ReviewDb db = database.open()) {
         for (;;) {
           Map.Entry<Project.NameKey, List<ChangeNotes>> next = next();
           if (next != null) {