Java Utililty Methods XML Parse File

if (file == null)
    throw new IllegalArgumentException("Must provide non-null XML input to parse!");
try {
    final Document document;
    DocumentBuilder documentBuilder = createDocumentBuilder();
    document = documentBuilder.parse(file);
    return document;
} catch (SAXException e) {
...

try {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setCoalescing(true);
    factory.setIgnoringComments(true);
    factory.setIgnoringElementContentWhitespace(true);
    factory.setNamespaceAware(true);
    DocumentBuilder parser = factory.newDocumentBuilder();
    return parser.parse(file);
...

DocumentBuilder builder = javax.xml.parsers.DocumentBuilderFactory.newInstance().newDocumentBuilder();
return builder.parse(iFile);

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setIgnoringComments(true);
factory.setCoalescing(true); 
factory.setNamespaceAware(false); 
factory.setValidating(false); 
DocumentBuilder parser = factory.newDocumentBuilder();
return parser.parse(input);

DocumentBuilderFactory factory = getDocumentBuilderFactory(xml.getName());
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setErrorHandler(errorHandler);
return builder.parse(xml);

FileInputStream input = new FileInputStream(fileName);
XMLInputFactory xif = XMLInputFactory.newInstance();
XMLStreamReader xmlStreamReader = xif.createXMLStreamReader(input);
return xmlStreamReader;

Document document = null;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
factory.setNamespaceAware(true);
try {
    DocumentBuilder builder = factory.newDocumentBuilder();
    document = builder.parse(new File(fileName));
    return document;
...

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
try {
    return builder.parse(new InputSource(filename));
} catch (SAXException ex) {
    IOException exception = new IOException("Failed to parse '" + filename + "'");
    exception.initCause(ex);
    throw exception;
...

File file = new File(filename);
return parse(file);

Document document = null;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
factory.setNamespaceAware(true);
try {
    DocumentBuilder builder = factory.newDocumentBuilder();
    document = builder.parse(new File(fileName));
    return document;
...