added slf4j simple logger

pom.xml

@@ -133,6 +133,10 @@
 			<artifactId>hibernate-entitymanager</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-simple</artifactId>
+		</dependency>
 	</dependencies>
 
 	<dependencyManagement>

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/business/CalendarTaskRefresher.java

@@ -12,7 +12,6 @@ import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 
 import de.kreth.vaadin.clubhelper.vaadinclubhelper.dao.ClubEventDao;
-import de.kreth.vaadin.clubhelper.vaadinclubhelper.dao.EventBusiness;
 import de.kreth.vaadin.clubhelper.vaadinclubhelper.data.ClubEvent;
 
 @Component

src/main/resources/simplelogger.properties

@@ -0,0 +1 @@
+org.slf4j.simpleLogger.defaultLogLevel = trace