public TailProcess(String[] args){
        super(args);
        if(arguments.size() < 3){
            System.out.println("GrepProcess[" + id + "]: " +
                               "usage: run TailProcess OUTPUTLINE INPUT OUTPUT");
            return;
        }
        outputLine = Integer.parseInt(arguments.get(0));
        
        inputStream = new TransactionalFileInputStream(new File(arguments.get(1)));
        outputStream = new TransactionalFileOutputStream(new File(arguments.get(2)));
        step = 0;
        fileLine = 0;
        lineCount = 0;
    }