Program terminates but doesn't execute what's after the loop

Question

the loop works fine but the program doesn't execute further and compilers outputs this "[JDA MainWS-ReadThread] ERROR JDA - One of the EventListeners had an uncaught exception java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds for length 2"

When a message is received it's split into words that may or may not be in the excel sheet if it is found a counter in the cell next to it is increased by 1. The initial problem was this " java.io.IOException: Cannot write data, document seems to have been closed already at events.Ready Events.on Event(ReadyEvents.java:99)" which I assumed occurred because I was trying to write to the excel sheet after closing it. the close() method was called inside the loop. So I moved the method outside of the loop and it doesn't even execute

here's my code

    String m = ((MessageReceivedEvent) genericEvent).getMessage().getContentRaw();

    String[] sep = m.split(" ");

    if ( genericEvent instanceof MessageReceivedEvent){



        FileInputStream inputStream = null;

        try {
            inputStream = new FileInputStream("New Microsoft Excel Worksheet.xlsx");
        } catch (FileNotFoundException e) {
            System.out.println("File not found");
        }

        Workbook workbook = null;

        try {
            workbook = new XSSFWorkbook(inputStream);
        } catch (IOException e) {
            System.out.println("IO exception");
        }

        Sheet sheet = workbook.getSheet("Sheet1");
        int i=0;
         do {

            Row row = sheet.getRow(i);
            Cell cell = row.getCell(y);
            String value = cell.getStringCellValue();
            System.out.println("Looping");


            for(int p=0;p<100;p++){

                if(sep[p] == null){
                    break;
                }

                System.out.println(sep[p] + "\n");
                boolean check = sep[p].matches("(?is).*\\b" + value + "\\b.*");
            if(check == true){
                System.out.println("fOUND");

                row = sheet.getRow(i);
                cell = row.getCell(1);
                cell.setCellValue(cell.getNumericCellValue()+1);

                System.out.println("Done");
            } }
            i++;
        } while (i<30);

         System.out.println("out of loop");


        FileOutputStream outputStream = null;
        try {
            outputStream = new FileOutputStream("New Microsoft Excel Worksheet.xlsx");
        } catch (FileNotFoundException e) {

            System.out.println("CAUGHT");
        }


        try {
            workbook.write(outputStream);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        try {
            workbook.close();
        } catch (IOException e) {
            System.out.println("CAUGHT");
        }
        try {
            outputStream.close();
        } catch (IOException e) {
            System.out.println("CAUGHT");
        }


        System.out.println("saved");