Java var from statement doesn't save

I can't save var stop so it can stop for cycle. I just need when tryOpen is true to exit that method and stop doing recursion.

    public void moznosti(char [] arr, String pr, int a, int b) {
        boolean stop = false;
        if (b == 0) {
            char [] heslo = pr.toCharArray();
            for (int i = 0; i < heslo.length; i++) {
                System.out.print(heslo[i]);
            }
            System.out.println();
            if (tryOpen(heslo)) {
                stop = true;
                System.out.println("END");
            }
            return;
        }
        if (stop == false) {
            for (int i = 0; i < a; i++) {
                String tmp = pr+arr[i];
                moznosti(arr, tmp, a, b-1);
            }  
        }
    }