diff --git a/src/main/java/teetime/stage/basic/AbstractTransformation.java b/src/main/java/teetime/stage/basic/AbstractTransformation.java
index 35fc4e81c97ede9bd784926da69f15e6b74bd5e2..1e65a45a81f69ff60c6b87b271b82a1cb5e9906c 100644
--- a/src/main/java/teetime/stage/basic/AbstractTransformation.java
+++ b/src/main/java/teetime/stage/basic/AbstractTransformation.java
@@ -27,7 +27,7 @@ public abstract class AbstractTransformation<I, O> extends AbstractConsumerStage
 	}
 
 	@Override
-	public OutputPort<O> getOutputPort() {
+	public final OutputPort<O> getOutputPort() {
 		return outputPort;
 	}
 }
diff --git a/src/site/markdown/wiki b/src/site/markdown/wiki
deleted file mode 160000
index 0a5bd4ddb82684ce1ae2ec84c67ff2117ebff143..0000000000000000000000000000000000000000
--- a/src/site/markdown/wiki
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 0a5bd4ddb82684ce1ae2ec84c67ff2117ebff143