code: protected void initWriters() throws IOException
  	{
  		String summarywriter = prefix == null ? "VAL_SUMMARY.txt" : prefix + "_" + "VAL_SUMMARY.txt";
  		String infowriter = prefix == null ? "VAL_INFO.txt" : prefix + "_" + "VAL_INFO.txt";
  		String errorwriter = prefix == null ? "VAL_ERROR.txt" : prefix + "_" + "VAL_ERROR.txt";
  		String reportswriter = prefix == null ? "VAL_REPORTS.txt" : prefix + "_" + "VAL_REPORTS.txt";
  		String fixwriter = prefix == null ? "VAL_FIXES.txt" : prefix + "_" + "VAL_FIXES.txt";
  		summaryWriter = new PrintWriter(summarywriter,"UTF-8");
  		infoWriter = new PrintWriter(infowriter,"UTF-8");
  		errorWriter = new PrintWriter(errorwriter,"UTF-8");
  		reportWriter = new PrintWriter(reportswriter,"UTF-8");
  		fixWriter = new PrintWriter(fixwriter,"UTF-8");
  	}
docs: separate method to instantiate so unit tests can call this
  
  @throws IOException