saveDocument();
saveDocument(projectXML);
	public void setProjectDescription(String projectName, String newDescr)	{		XPath xpath = XPathFactory.newInstance().newXPath();		String expression = "//project[@name='"+projectName+"']";		Element elem = null;				try {			elem = (Element)xpath.evaluate(expression, this.doc, XPathConstants.NODE);		}		catch (XPathExpressionException e) {			e.printStackTrace();		}		if ( elem != null ) {			elem.setAttribute(ProjectsParser.ATTR_DESC, newDescr);			saveDocument();		}		else {			System.out.println("setProjectDescription: Modification de la description du projet "+ projectName + " impossible!"); 		}	}