From d3136df13414278fdfabc7d0284f84da5dc864fa Mon Sep 17 00:00:00 2001
From: Paul Campbell <pcampbell@kemitix.net>
Date: Tue, 6 Sep 2016 20:22:52 +0100
Subject: [PATCH] InterfaceTypeParameterName: enabled

---
 README.md                                     | 20 ++++++++++++++-----
 src/main/resources/net/kemitix/checkstyle.xml |  1 +
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 006a88e..0b1d1a7 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,7 @@ You need to include `checkstyle` as the version bundled with the `maven-checksty
 * [InnerClass](#innerclass) - sevntu - disabled
 * [InnerTypeLast](#innertypelast) - checkstyle - enabled
 * [InterfaceIsType](#interfaceistype) - checkstyle - enabled
-* [InterfaceTypeParameterName](#interfacetypeparametername) - checkstyle - disabled
+* [InterfaceTypeParameterName](#interfacetypeparametername) - checkstyle - enabled
 * [InterfaceTypeParameterName](#interfacetypeparametername-1) - sevntu - disabled
 * [JavadocMethod](#javadocmethod) - checkstyle - enabled
 * [JavadocPackage](#javadocpackage) - checkstyle - enabled
@@ -1259,6 +1259,20 @@ interface Foo {
 }
 ````
 
+#### [InterfaceTypeParameterName](http://checkstyle.sourceforge.net/config_naming.html#InterfaceTypeParameterName)
+
+Checks that the type parameters for an interface are a single uppercase letter.
+
+Valid:
+````
+interface <T> Portable {}
+````
+
+Invalid:
+````
+interface <Type> Portable {}
+````
+
 #### [JavadocMethod](http://checkstyle.sourceforge.net/config_javadoc.html#JavadocMethod)
 
 Checks that all public, protected and package methods have a Javadoc block, that all `@throws` tags are used. Basic setters and getters do not require javadoc.
@@ -2661,10 +2675,6 @@ Generic rule; doesn't embody a 'quality' check.
 
 Couldn't get my IDE's (IntelliJ) code style to match.
 
-#### [InterfaceTypeParameterName](http://checkstyle.sourceforge.net/config_naming.html#InterfaceTypeParameterName)
-
-> TODO: enable
-
 #### [JavadocTagContinuationIndentation](http://checkstyle.sourceforge.net/config_javadoc.html#JavadocTagContinuationIndentation)
 
 Couldn't get my IDE's (IntelliJ) code style to match.
diff --git a/src/main/resources/net/kemitix/checkstyle.xml b/src/main/resources/net/kemitix/checkstyle.xml
index 82440f0..520c9f2 100644
--- a/src/main/resources/net/kemitix/checkstyle.xml
+++ b/src/main/resources/net/kemitix/checkstyle.xml
@@ -104,6 +104,7 @@
         <module name="InnerAssignment"/> <!-- prevent assignments in subexpressions (i.e. while((line = read()){}) -->
         <module name="InnerTypeLast"/> <!-- inner classes appear after methods and fields -->
         <module name="InterfaceIsType"/> <!-- interface must define method not just constants -->
+        <module name="InterfaceTypeParameterName"/> <!-- interface generic type is a single uppercase letter -->
 
         <module name="JavadocMethod"> <!-- methods should have javadoc block -->
             <property name="scope" value="package"/> <!-- if they are public, protected or package -->