#354 Add maven model for feature toggle design pattern

private-class-data/index.md

@@ -10,12 +10,14 @@ tags:
  - Idiom
 ---
 
-**Intent:** Private Class Data design pattern seeks to reduce exposure of
+## Intent
+Private Class Data design pattern seeks to reduce exposure of
 attributes by limiting their visibility. It reduces the number of class
 attributes by encapsulating them in single Data object.
 
 ![alt text](./etc/private-class-data.png "Private Class Data")
 
-**Applicability:** Use the Private Class Data pattern when
+## Applicability
+Use the Private Class Data pattern when
 
 * you want to prevent write access to class data members