Use try-with-resources.
diff --git a/src/test/java/org/apache/commons/configuration2/reloading/TestVFSFileHandlerReloadingDetector.java b/src/test/java/org/apache/commons/configuration2/reloading/TestVFSFileHandlerReloadingDetector.java
index b843824..78ee00b 100644
--- a/src/test/java/org/apache/commons/configuration2/reloading/TestVFSFileHandlerReloadingDetector.java
+++ b/src/test/java/org/apache/commons/configuration2/reloading/TestVFSFileHandlerReloadingDetector.java
@@ -63,9 +63,9 @@
      */
     private void writeTestFile(final File file, final String value) throws IOException
     {
-        final FileWriter out = new FileWriter(file);
-        out.write(String.format(FMT_XML, value));
-        out.close();
+        try (final FileWriter out = new FileWriter(file)) {
+            out.write(String.format(FMT_XML, value));
+        }
     }
 
     /**