public class LogExample {
	private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(LogExample.class);
	
	public static void main(String... args) {
		log.error("Something's wrong here");
	}
}

public class LogExampleOther {
	private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(java.util.List.class);
	
	public static void main(String... args) {
		log.warn("Something might be wrong here");
	}
}