public class MineDiamond implements EffortEvent {

    @Override
    public EffortType getEventType ( ) {
      /* Event Type is BLOCK_BREAK because we want to check diamond      ores mined */
        return EffortType. BLOCK_BREAK ;
    }

    @Override
    public boolean checkPlayer ( Event e ) {
// Change Event to BlockBreakEvent
        BlockBreakEvent ev = (BlockBreakEvent ) e ;
 
// Check if the Block Material is a Diamond Ore
      if (ev. getBlock ( ). getType ( ) != XMaterial. DIAMOND_ORE. parseMaterial ( ) ) return false ;

//Check if block break event is cancelled
        if (ev. isCancelled ( ) ) return false ;

// Player has broken a diamond ore, return true.
        return true ;
    }

    @Override
    public String getEffortID ( ) {
// Put in the ID of the effort.
        return "MINEDIAMOND" ;
    }

    @Override
    public String getDisplayName ( ) {
// Optional
        return "Diamond Ores Mined" ;
    }

}

    @Override
    public void onEnable ( ) {
// register the Event with EffortAPI.registerEvent on your onEnable()
        EffortAPI. registerEvent ( new MineDiamond ( ) ) ;
    }
 

    @EventHandler
    public void giveRewardForMiningDiamond (EffortBukkitEvent e )
    {
        // Check if the id is MINEDIAMOND
        if (e. getEffortEvent ( ). getEffortID ( ). equalsIgnoreCase ( "MINEDIAMOND" ) ) {
            // Give reward
        }
    }