Adding the Lang checkstyle. I'm sure it'll need modifying to match Collections code style, but it's a start

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@637493 13f79535-47bb-0310-9956-ffa450edef68

checkstyle.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<!DOCTYPE module PUBLIC
+    "-//Puppy Crawl//DTD Check Configuration 1.1//EN"
+    "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">
+
+<!-- commons lang customization of default Checkstyle behavior -->
+<module name="Checker">
+  <property name="localeLanguage" value="en"/>
+  <module name="PackageHtml"/>
+  <module name="TreeWalker">
+    <module name="TabCharacter"/>
+    <module name="AvoidStarImport"/>
+    <module name="RedundantImport"/>
+    <module name="UnusedImports"/>
+    <module name="NeedBraces"/>
+    <module name="RedundantThrows">
+      <property name="allowUnchecked" value="true"/>
+    </module>
+    <module name="LineLength">
+      <property name="max" value="120"/>
+    </module>
+    <module name="JavadocMethod">
+      <property name="allowUndeclaredRTE" value="true"/>
+    </module>
+ </module>
+</module>
+                        
+