How to add new attribute to given node in XML file using DOM parser in Java?

AddEmployeeAttribute.java

package com.javamultiplex;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class AddEmployeeAttribute {

	public static void main(String[] args) throws IOException, ParserConfigurationException, SAXException, TransformerException {

		File file = new File("src/main/resources/employee.xml");
		BufferedReader input=null;
		try
		{
			input=new BufferedReader(new InputStreamReader(System.in));
			DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
			DocumentBuilder builder=factory.newDocumentBuilder();
			Document document=builder.parse(file);
			System.out.println("Enter employee id : ");
			int id=Integer.parseInt(input.readLine());
			System.out.println("Enter attribute name : ");
			String attribute=input.readLine();
			System.out.println("Enter attribute value : ");
			String value=input.readLine();
			boolean result=addEmployeeAttributeInXml(document,id,attribute,value);
			if(result)
			{
				TransformerFactory tFactory=TransformerFactory.newInstance();
				Transformer transformer=tFactory.newTransformer();
				transformer.setOutputProperty(OutputKeys.INDENT, "yes");
				DOMSource source=new DOMSource(document);
				StreamResult sResult=new StreamResult(file);
				transformer.transform(source, sResult);
				System.out.println("Employee attribute has been added successfully.");
			}
			else
			{
				System.out.println("Employee not exist.");
			}
		}
		finally
		{
			if(input!=null){
				input.close();
			}
		}

	}

	private static boolean addEmployeeAttributeInXml(Document document, int id, String attribute, String value) {
		
		NodeList list=document.getElementsByTagName("Employee");
		boolean result=false;
		int length=list.getLength();
		for(int i=0;i<length;i++)
		{
			Node node=list.item(i);
			if(node.getNodeType()==Node.ELEMENT_NODE)
			{
				Element element=(Element)node;
				if(element.getAttribute("id").equals(String.valueOf(id)))
				{
					element.setAttribute(attribute, value);
					result=true;
					break;
				}
			}
		}
		
		return result;
		
	}

}