Как исправить?

while ((s = fis.readLine()) != null ) {
                    sn = s.substring(0,8).trim();

maxID++;
                result = (maxID + "" + wr(s,8) + wr(s,30) + wr(s,8) + wr(s,4));
                fos.write(result);

if (args[1].equals("productName")) {
                        s = s.substring(8);
                         productName = s.substring(0, 30).trim();

-c  "Шорты пляжные с рисунком в розовый горошек" 13.00  25

int maxID = 0;
            String result = "";
            String productName = args[1];
            String price = args[2];
            String quantity = args[3];
            int id;
            String sn = null;
            if (args.length != 0 & args[0].equals("-c")) {
                String s;
                while ((s = fis.readLine()) != null && !s.isEmpty() ) {
                    sn = s.substring(8).trim();
                    id = Integer.parseInt(s.substring(0, 8).trim());
                    if (id > maxID) {
                        maxID = id;
                    }
                    maxID++;
                        if (productName.length() > 30) {
                            productName = productName.substring(0,30).trim();
                        }
                        else {
                            while (productName.length() != 30) {
                                productName += " ";
                            }
                        }
                    if (price.length() > 8) {
                        price = price.substring(0,8).trim();
                    }
                    else {
                        while (price.length() != 8) {
                            price += " ";
                        }
                    }
                    if (quantity .length() > 8) {
                        quantity  = quantity .substring(0,8).trim();
                    }
                    else {
                        while (quantity .length() != 8) {
                            quantity  += " ";
                        }
                    }
                    result = (maxID + productName + price + quantity);
                    fos.write("\n"+result);
                }
                fos.close();
            }
            fis.close();
        }
    }
}

while ((s = fis.readLine()) != null && !s.isEmpty()) {
                    //sn = s.substring(0,8).trim();
                    id = Integer.parseInt(s.substring(0, 8).trim());
                    if (id > maxID) {
                        maxID = id;
                    }
                    maxID++;
                }

while ((s = fis.readLine()) != null && !s.isEmpty()) {
                    str_id = s.substring(0, 8).trim();
                    id = Integer.parseInt(str_id);
                    if (id > maxID) {
                        maxID = id;
                    }
                    StringBuffer stringBuffer = new StringBuffer();
                    if (str_id.length() <= 8)
                        stringBuffer.append(id);
                    for (int i = 0; i <= 8 - str_id.length(); i++) {
                        stringBuffer.append(" ");
                    }
                    maxID++;
                }

while ((s = fis.readLine()) != null && !s.isEmpty()) {
                    id = s.substring(0, 8).trim();
                    int dID = Integer.parseInt(id);
                    int mID = Integer.parseInt(maxID.trim());
                    if (dID > mID) {
                        mID = dID;
                    }
                    mID++;
                    maxID = String.valueOf(mID);
                    if (maxID.length() > 8) {
                        maxID = maxID.substring(0,8).trim();
                    }
                    else if (maxID.length() < 8) {
                        while (maxID.length() != 8) {
                            maxID += " ";
                        }
                    }

String.format("%-8d %-30s %-8.2f %-4d", id, args[1], args[2], args[3]);

String productName = args[1];
...
if (productName.length() > 30) {...}

BuffereWriter fos = new BufferedWriter(name, true);
нужно
FileWriter fos = new FileWriter(name, true);

String id = "1";
String maxID = "0";
...
id = s.substring(0, 8).trim();
int dID = Integer.parseInt(id);
int mID = Integer.parseInt(maxID.trim());
...
if (dID >= mID)