embulk-standards/src/main/java/org/embulk/standards/LocalFileOutputPlugin.java in embulk-0.6.16 vs embulk-standards/src/main/java/org/embulk/standards/LocalFileOutputPlugin.java in embulk-0.6.17

@@ -80,13 +80,12 @@
 
         final String pathPrefix = task.getPathPrefix();
         final String pathSuffix = task.getFileNameExtension();
         final String sequenceFormat = task.getSequenceFormat();
 
-        final List<String> fileNames = new ArrayList<>();
-
         return new TransactionalFileOutput() {
+            private final List<String> fileNames = new ArrayList<>();
             private int fileIndex = 0;
             private FileOutputStream output = null;
 
             public void nextFile()
             {
@@ -132,10 +131,11 @@
             public void close()
             {
                 closeFile();
             }
 
-            public void abort() { }
+            public void abort()
+            { }
 
             public CommitReport commit()
             {
                 CommitReport report = Exec.newCommitReport();
                 // TODO better setting for Report