file has been written.

src/main/java/eu/simstadt/regionchooser/RegionChooserBrowser.java

@@ -95,6 +95,7 @@ public int downloadRegionFromCityGMLs(String wktPolygon, String project, String
 			try (BufferedWriter gmlWriter = Files.newBufferedWriter(outputFile.toPath())) {
 				count = RegionExtractor.selectRegionDirectlyFromCityGML(wktPolygon, srsName, gmlWriter, paths);
 			}
+			LOGGER.info(outputFile + " has been written");
 			return count;
 		}