(Buffered)Image watermarking

Watermark.java

private static BufferedImage watermark(BufferedImage image, String text) {
  final FontMetrics fm = graphics.getFontMetrics();
  // center text string
  final int x = (image.getWidth() / 2) - fm.stringWidth(text);
  final int y = (image.getHeight() / 2) - fm.getHeight();

  final Graphics2D graphics = image.createGraphics();
  graphics.setPaint(Color.white);
  graphics.setFont(new Font("SansSerif", Font.BOLD, 10));
  graphics.drawString(text, x, y);
  graphics.dispose();

  return image;
}