JobStatusController: Open JsonWriter in try-with-resource

Change-Id: Id606a3b33ed137fc0c488b88476c09d257945c3e
diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/JobStatusController.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/JobStatusController.java
index 0c5e52f..5489282 100644
--- a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/JobStatusController.java
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/wizard/JobStatusController.java
@@ -42,8 +42,9 @@
     for (GitJob job : jobs) {
       jobListStatus.add(job.getStatus());
     }
-    new Gson().toJson(jobListStatus, jobListStatus.getClass(), new JsonWriter(
-        resp.getWriter()));
+    try (JsonWriter writer = new JsonWriter(resp.getWriter())) {
+      new Gson().toJson(jobListStatus, jobListStatus.getClass(), writer);
+    }
   }