8232003: (fs) Files.write can leak file descriptor in the exception case

Summary: Be sure to close the leaked OutputStream in all cases
Reviewed-by: alanb, bpb, clanger

src/share/classes/java/nio/file/Files.java

@@ -3348,8 +3348,8 @@ public final class Files {
         // ensure lines is not null before opening file
         Objects.requireNonNull(lines);
         CharsetEncoder encoder = cs.newEncoder();
-        OutputStream out = newOutputStream(path, options);
-        try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, encoder))) {
+        try (OutputStream out = newOutputStream(path, options);
+             BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, encoder))) {
             for (CharSequence line: lines) {
                 writer.append(line);
                 writer.newLine();