--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/states/RangeState.java	Tue Nov 24 18:52:24 2015 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/RangeState.java	Wed Dec 02 19:35:11 2015 +0100
@@ -41,11 +41,13 @@
         if (from < fromValid) {
             log.error(
                 "Invalid 'from'. " + from + " is smaller than " + fromValid);
+            // error message used in client to resolve i18n
             throw new IllegalArgumentException("error_feed_from_out_of_range");
         }
         else if (to > toValid) {
             log.error(
                 "Invalid 'to'. " + to + " is bigger than " + toValid);
+            // error message used in client to resolve i18n
             throw new IllegalArgumentException("error_feed_to_out_of_range");
         }