code: public void addTargetHandler( TargetHandler targetItf ) {
  
  		if( targetItf != null ) {
  			this.logger.info( "Target handler '" + targetItf.getTargetId() + "' is now available in Roboconf's DM." );
  
  			synchronized( this.targetHandlers ) {
  				this.targetHandlers.add( targetItf );
  			}
  
  			listTargets( this.targetHandlers, this.logger );
  		}
  	}
docs: Adds a new target handler.
  @param targetItf a target handler