+ private void saveKnownPosts() throws ConfigurationException {
+ int postCounter = 0;
+ for (String knownPostId : knownPosts) {
+ configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
+ }
+ configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
+ }
+