add README.md
diff --git a/org.eclipse.osbp.runtime.logback.fragment/README.md b/org.eclipse.osbp.runtime.logback.fragment/README.md
new file mode 100644
index 0000000..db1e5bb
--- /dev/null
+++ b/org.eclipse.osbp.runtime.logback.fragment/README.md
@@ -0,0 +1,4 @@
+logback fragment
+================
+
+If this fragment is added to the OSGi environment, only Messages of Type INFO or higher (WARNING, ERROR,...) are shown.