checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.1//EN" "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">

<!-- For info on these checks, see http://checkstyle.sourceforge.net/config.html -->
<!-- Uppercase comments indicate the 'section' in the checkstyle documentation. -->

<module name="Checker">
  <property name="charset" value="UTF-8"/>
   <module name="FileTabCharacter"/> 


  <module name="JavadocPackage">
    <property name="allowLegacy" value="true"/>
  </module>

  <module name="TreeWalker">
    <!-- JAVADOC COMMENTS -->
    <module name="JavadocType">
      <property name="authorFormat" value="\S"/>
    </module>  

    <!-- Suppress violations when can't find ServletException class etc. -->
    <module name="JavadocMethod">
      <property name="allowUndeclaredRTE" value="true"/>
    </module>
           
    <module name="JavadocVariable">
       <property name="scope" value="public"/>
    </module>

    <module name="JavadocStyle"/>    

    <!-- IMPORTS -->
    <module name="AvoidStarImport"/>
    <module name="RedundantImport"/>
    <module name="UnusedImports"/> 
      
    <!-- NAMING CONVENTIONS --> 
    <module name="ConstantName">
      <property name="format" value="^[a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
    </module>
    <module name="MethodName"/>
    <module name="ParameterName"/>
    <module name="TypeName"/>

    <!-- SIZE VIOLATIONS -->
    <!-- Disabled due to Eclipe's Format command ignoring line length -->
<!-- <module name="LineLength">
      <property name="max" value="100"/>
    </module> -->
      
    <!-- WHITESPACE -->
    <module name="WhitespaceAround">
      <!-- Don't require whitespace around generic tokens like '<', '>', and '?' --> 
      <property name="tokens" value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BAND_ASSIGN, 
                                     BOR,BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, COLON, 
                                     DIV, DIV_ASSIGN, EQUAL, GE, GT, LAND, LCURLY, LE, LITERAL_ASSERT, 
                                     LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, 
                                     LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SYNCHRONIZED, 
                                     LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS, MINUS_ASSIGN, 
                                     MOD, MOD_ASSIGN, NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION, 
                                     RCURLY, SL, SLIST, SL_ASSIGN, SR, SR_ASSIGN, STAR, STAR_ASSIGN"/>
    </module>


    <!-- MODIFIERS -->
    <module name="ModifierOrder"/>

    <!-- BLOCK CHECKS -->
    <module name="EmptyBlock">
      <property name="option" value="text"/>
    </module>  

    <!-- CODING -->
    <module name="EqualsHashCode"/>      
    <module name="LeftCurly"/>
    <module name="NeedBraces"/>
    <module name="RightCurly">
      <property name="option" value="alone"/>
    </module>
    <module name="AvoidNestedBlocks"/>
    <module name="SimplifyBooleanExpression"/>
    <module name="SimplifyBooleanReturn"/>
  </module>
</module>