--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/mpiwg/web/search/SortSectionBySource.java	Wed Jun 21 06:17:41 2017 +0200
@@ -0,0 +1,18 @@
+package de.mpiwg.web.search;
+
+import java.util.Comparator;
+
+import de.mpiwg.gazetteer.db.DBSection;
+
+
+public class SortSectionBySource implements Comparator<DBSection>{
+
+	public int compare(DBSection o1, DBSection o2) {
+
+		if(o1.getBook() == null || o2.getBook() == null){
+			return o1.getName().compareTo(o2.getName());
+		}
+		return o1.getBook().getSource().compareTo(o2.getBook().getSource());
+	}
+
+}