overhauled code for Rosenkeller

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.app/src/main/java/de/srsoftware/cal/app/Application.java

@@ -1,7 +1,7 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.app;
 
-import de.srsoftware.cal.importer.JenaRosenkeller;
+import de.srsoftware.cal.importer.jena.Rosenkeller;
 
 /**
  * Test application
@@ -15,7 +15,7 @@ public class Application {
 	 * @param args default
 	 */
 	public static void main(String[] args) {
-		var rosenkeller	 = new JenaRosenkeller();
+		var rosenkeller	 = new Rosenkeller();
 		var appointments = rosenkeller.fetch();
 		appointments.forEach(System.err::println);
 	}