Allow using "_" in class,interface,enums, and annotation names. am: be94f39b2b am: 9ba07ef335 am: dcc4b924d5
am: 075fddec62

Change-Id: I14e3628cc4b9c2f4d1049b334110e5e2c1a651a0
diff --git a/default-treewalker-checks.xml b/default-treewalker-checks.xml
index 6e9e31b..0ce93be 100644
--- a/default-treewalker-checks.xml
+++ b/default-treewalker-checks.xml
@@ -42,6 +42,7 @@
 </module>
 <module name="TypeName">
   <property name="severity" value="error"/>
+  <property name="format" value="^[A-Z][a-zA-Z0-9_]*$"/>
 </module>
 <module name="ConstantName">
   <property name="severity" value="error"/>