Load from local disk

// Constants.InDocumentDocx is an absolute or relative path to your document. Ex: "C:\\Docs\\document.docx"
String filePath = Constants.InDocumentDocx;                                                                 
Watermarker watermarker = new Watermarker(filePath);                                                        
// use watermarker methods to manage watermarks                                                             
TextWatermark watermark = new TextWatermark("Test watermark", new Font("Arial", 12));                       
                                                                                                            
watermarker.add(watermark);                                                                                 
watermarker.save(Constants.OutDocumentDocx);                                                                
watermarker.close();