The use of a FileWriter is already demonstrated in a previous item about the PrintWriter.
See the example at the PrinterWriter and look carefully at the bold 
source code the boolean determins if a file is opened for "w" (write) or "a+" (append). So the newfile will 
be cleared every time the source is run, but appendfile will grow.
      bulkwriter = new PrintWriter( 
        new BufferedWriter( new FileWriter ("newfile", false)));
      bulksavwriter = new PrintWriter( 
        new BufferedWriter( new FileWriter ("appendfile", true)));