Java SimpleFileVisitor copy directory

import java.io.IOException;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.FileVisitOption;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.EnumSet;

class CopyDirectory extends SimpleFileVisitor<Path> {

   private Path source;
   private Path target;

   public CopyDirectory(Path source, Path target) {
      this.source = source;
      this.target = target;
   }//from  w  ww  .j  ava  2s . com

   @Override
   public FileVisitResult visitFile(Path file, BasicFileAttributes attributes) throws IOException {
      System.out.println("Copying " + source.relativize(file));
      Files.copy(file, target.resolve(source.relativize(file)));
      return FileVisitResult.CONTINUE;
   }

   @Override
   public FileVisitResult preVisitDirectory(Path directory, BasicFileAttributes attributes) throws IOException {
      Path targetDirectory = target.resolve(source.relativize(directory));
      try {
         System.out.println("Copying " + source.relativize(directory));
         Files.copy(directory, targetDirectory);
      } catch (FileAlreadyExistsException e) {
         if (!Files.isDirectory(targetDirectory)) {
            throw e;
         }
      }
      return FileVisitResult.CONTINUE;
   }
}

public class Main {

   public static void main(String[] args) {
      try {
         Path source = Paths.get("/home");
         Path target = Paths.get("/backup");
         Files.walkFileTree(source, EnumSet.of(FileVisitOption.FOLLOW_LINKS), Integer.MAX_VALUE,
               new CopyDirectory(source, target));
      } catch (IOException ex) {
         ex.printStackTrace();
      }
   }
}