diff --git a/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessor.java b/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessor.java
index 26930abcc3..e302b82b1c 100644
--- a/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessor.java
+++ b/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessor.java
@@ -38,6 +38,9 @@ package sonia.scm.repository;
 import sonia.scm.plugin.ExtensionPoint;
 
 /**
+ * A pre processor for {@link Changeset} objects. A pre processor is able to 
+ * modify the object before it is delivered to the user interface.
+ * 
  * TODO for 2.0 extends {@link PreProcessor} interface.
  * 
  * @author Sebastian Sdorra
diff --git a/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessorFactory.java b/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessorFactory.java
index 7805be8854..47f0a7ccd7 100644
--- a/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessorFactory.java
+++ b/scm-core/src/main/java/sonia/scm/repository/ChangesetPreProcessorFactory.java
@@ -38,6 +38,9 @@ package sonia.scm.repository;
 import sonia.scm.plugin.ExtensionPoint;
 
 /**
+ * The ChangesetPreProcessorFactory create {@link ChangesetPreProcessor}
+ * objects for a specific repository.
+ * 
  * TODO for 2.0 extends {@link PreProcessorFactory} interface.
  *
  * @author Sebastian Sdorra