Crear archivo temporal en Java

File temp=null;
FileWriter fileWriter=null;
PrintWriter printWriter=null;

try 
{
	temp = File.createTempFile("temp-file-name", ".txt");
	
	String rutaTemp=temp.getAbsolutePath();
	
	fileWriter=new FileWriter(rutaTemp, true);
	
	printWriter=new PrintWriter(fileWriter);
	
	printWriter.println(txtContenido.getText());
	
	Desktop.getDesktop().open(temp);
}
catch (IOException e) {
	JOptionPane.showMessageDialog(thisJFrame, "No se puede abrir el programa.", "Error", JOptionPane.ERROR_MESSAGE);
}
finally
{
	if(printWriter!=null)
	{
		printWriter.close();
	}
	
	if(fileWriter!=null)
	{
		try
		{
			fileWriter.close();
		}
		catch(Exception ex)
		{
			JOptionPane.showConfirmDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
		}
	}
}