Como criar um link que aponte para um arquivo que eu acabei de criar?

public URI getPayrollList(String code, Date fromDate, Date toDate) throws Exception {
        ArrayList employees;
        Sumarizes sum;

        DecimalFormat format = new DecimalFormat(TimeCardConstants.PAYROLL_LIST_FORMAT_VALUES);

        if (fromDate == null || toDate == null) {
            throw new IdException("Invalid data.");
        }

        File arq = new File("arquivo.txt");
        if (arq.exists()) {
            arq.delete();
        }

        try {
            FileWriter writer = new FileWriter(arq);
            BufferedWriter buffer = new BufferedWriter(writer);

            for (int x = 0; x < employees.size(); x++) {

                StringBuffer text = new StringBuffer();

                double sumOverTime100 = 0.0;

                User emp = (User) employees.get(x);
                //insert in the ArrayList data the Summary for All employees

                ArrayList timeCardList = (ArrayList) getTimeCard(emp.getUserId(), fromDate, toDate);
                Sumarizes sumarize = null;

                if (timeCardList != null && timeCardList.size() > 0) {
                    sumarize = (Sumarizes) timeCardList.get(timeCardList.size() - 1);

                    sumOverTime100 = sumarize.getOverTime100();
                }

                //begin the file
                //first the OverTime100 = code 1602
                if (sumOverTime100 > 0) {
                    text.append(TimeCardConstants.OVERTIME_100_ACCOUNT);
                    text.append(TimeCardConstants.COD_BUSINESS);
                    text.append(emp.getFedexId().trim());
                    text.append(format.format(sumOverTime100));
                    text.append(code);
                    buffer.write(text.toString());
                    buffer.newLine();
                }
            }
            buffer.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return arq.toURI();
    }