diff --git a/org.eclipse.forkexample.calc/src/org/eclipse/example/calc/BinaryOperation.java b/org.eclipse.forkexample.calc/src/org/eclipse/example/calc/BinaryOperation.java
index e3ea5e09..a60f4d64 100644
--- a/org.eclipse.forkexample.calc/src/org/eclipse/example/calc/BinaryOperation.java
+++ b/org.eclipse.forkexample.calc/src/org/eclipse/example/calc/BinaryOperation.java
@@ -15,6 +15,7 @@ public interface BinaryOperation extends Operation {
 	 * hier fehlt eine beschreibung immer noch
 	 * @param arg1 first parameter
 	 * @param arg2 second parameter
+	 * 
 	 * @return result of binary operation 
 	 */ 
 	public float perform(float arg1, float arg2);