import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.util.EnumSet;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import junit.framework.TestCase;

      throws IOException {
    Manifest manifest = new Manifest();
    // Without version, the manifest is silently ignored. Ugh!
    manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
    manifest.getMainAttributes().put(Attributes.Name.CLASS_PATH, jarFile.getName());

    Closer closer = Closer.create();
    try {
      FileOutputStream fileOut = closer.register(new FileOutputStream(jarFile));