FizzBuzz Scala

FizzBuzz.scala

import java.io.IOException
import java.nio.file.{FileAlreadyExistsException, Files, Paths}

import scala.math.BigInt

/**
  * Created by linhmtran on 1/23/16.
  */
object FizzBuzz extends App {
  try {
    val endNumber = BigInt(args(0))
    val file = Paths.get(args(1))
    Files.createFile(file)
    val writer = Files.newBufferedWriter(file)
    writer.write(System.currentTimeMillis().toString + "\n")

    var i = BigInt(1)
    var j = 1
    while (i <= endNumber) {
      writer.write(getOutput(j, i) + "\n")
      if (j == 15) j = 1 else j += 1
      i += 1
    }

    writer.write(System.currentTimeMillis().toString + "\n")
    writer.close()
  } catch {
    case e: NumberFormatException => println("The end number is invalid")
    case e: FileAlreadyExistsException => println("Please input a new file name")
    case e: IOException => println("Error open writer")
  }


  def getOutput(index: Int, num: BigInt) = {
    if (index == 15) "FizzBuzz"
    else if (index % 3 == 0) "Fizz"
    else if (index % 5 == 0) "Buzz"
    else num.toString()
  }
}