Dúvida API ou código

/**
 *
 * @author naueng2
 */
public class Teste {

    public void fala() {
        System.out.println("Agendamento realizado");
    }
}

import java.util.Date;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;

/**
 *
 * @author naueng2
 */
public class AppointmentReport {

    public void init(int days) {

        try {
            SchedulerFactory sf = new StdSchedulerFactory();
            Scheduler sched = sf.getScheduler();
            sched.start();

            JobDetail jd = new JobDetail("JobETL", sched.DEFAULT_GROUP, Teste.class);
            //SimpleTrigger st = new SimpleTrigger("TriggerETL", sched.DEFAULT_GROUP, new Date(), null, SimpleTrigger.REPEAT_INDEFINITELY, 2L * 24L * 60L * 60L * 1000L);
            SimpleTrigger st = new SimpleTrigger("TriggerETL", sched.DEFAULT_GROUP, new Date(), null, SimpleTrigger.REPEAT_INDEFINITELY, 1000);
            sched.scheduleJob(jd, st);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory