SomeMain.scala

object OpsMain {
  def main(args : Array[String]) {
    hadoop.util.ToolRunner.run(new hadoop.mapred.JobConf, new Tool[XXX]({args => new XXX(args)}), args)
  }
}

Tool.scala

import org.apache.hadoop
import com.twitter.scalding.{Job, Args, Mode}

class Tool[T <: Job](val createJob:(Args) => T) extends hadoop.conf.Configured with hadoop.util.Tool {

  protected def nonHadoopArgsFrom(args : Array[String]) : Array[String] = {
    (new hadoop.util.GenericOptionsParser(getConf, args)).getRemainingArgs
  }

  def parseModeArgs(args : Array[String]) : (Mode, Args) = {
    val a = Args(nonHadoopArgsFrom(args))
    (Mode(a, getConf), a)
  }

  def run(args : Array[String]) : Int = {
    val (mode, jobArgs) = parseModeArgs(args)
    val job = createJob(Mode.putMode(mode, jobArgs))
    if(job.run)0 else 1
  }

}