checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
  "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
  "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<!--

  Checkstyle configuration that checks the sun coding conventions from:
    - the Java Language Specification at
      http://java.sun.com/docs/books/jls/second_edition/html/index.html
    - the Sun Code Conventions at http://java.sun.com/docs/codeconv/
    - the Javadoc guidelines at
      http://java.sun.com/j2se/javadoc/writingdoccomments/index.html
    - the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html
    - some best practices

  Checkstyle is very configurable. Be sure to read the documentation at
  http://checkstyle.sf.net (or in your downloaded distribution).

  Most Checks are configurable, be sure to consult the documentation.

  To completely disable a check, just comment it out or delete it from the file.

  Finally, it is worth reading the documentation.

  Note: the original sun_checks.xml file has been modified for CERN MIG's developments.

-->

<module name="Checker">

  <property name="fileExtensions" value="java, properties, xml"/>

  <!-- Checks that a package-info.java file exists for each package.     -->
  <!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
  <module name="JavadocPackage"/>

  <!-- Checks whether files end with a new line.                        -->
  <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
  <module name="NewlineAtEndOfFile"/>

  <!-- Checks that property files contain the same keys.         -->
  <!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
  <module name="Translation"/>

  <!-- Checks for Size Violations.                    -->
  <!-- See http://checkstyle.sf.net/config_sizes.html -->
  <module name="FileLength"/>
  <module name="LineLength">
    <property name="max" value="96"/>
    <property name="ignorePattern" value="https?://"/>
  </module>

  <!-- Checks for whitespace                               -->
  <!-- See http://checkstyle.sf.net/config_whitespace.html -->
  <module name="FileTabCharacter"/>

  <!-- Miscellaneous other checks.                   -->
  <!-- See http://checkstyle.sf.net/config_misc.html -->
  <module name="RegexpSingleline">
    <property name="format" value="\s+$"/>
    <property name="minimum" value="0"/>
    <property name="maximum" value="0"/>
    <property name="message" value="Line has trailing spaces."/>
  </module>

  <module name="TreeWalker">

    <!-- Checks for Javadoc comments.                     -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html -->
    <module name="JavadocType"/>
    <module name="JavadocStyle"/>

    <!-- Checks for Naming Conventions.                  -->
    <!-- See http://checkstyle.sf.net/config_naming.html -->
    <module name="ConstantName">
      <property name="format" value="^([A-Z][A-Z0-9_]*|logger)$"/>
    </module>
    <module name="LocalFinalVariableName"/>
    <module name="LocalVariableName"/>
    <module name="MemberName"/>
    <module name="MethodName"/>
    <module name="PackageName"/>
    <module name="ParameterName"/>
    <module name="StaticVariableName"/>
    <module name="TypeName"/>

    <!-- Checks for imports                              -->
    <!-- See http://checkstyle.sf.net/config_import.html -->
    <module name="AvoidStarImport"/>
    <module name="IllegalImport"/>
    <module name="ImportOrder">
      <property name="groups" value="java,javax,com,org"/>
      <property name="ordered" value="true"/>
      <property name="separated" value="true"/>
    </module>
    <module name="RedundantImport"/>
    <module name="UnusedImports"/>

    <!-- Checks for Size Violations.                    -->
    <!-- See http://checkstyle.sf.net/config_sizes.html -->
    <module name="MethodLength"/>
    <module name="ParameterNumber"/>

    <!-- Checks for whitespace                               -->
    <!-- See http://checkstyle.sf.net/config_whitespace.html -->
    <module name="EmptyForIteratorPad"/>
    <module name="GenericWhitespace"/>
    <module name="MethodParamPad"/>
    <module name="NoWhitespaceAfter"/>
    <module name="NoWhitespaceBefore"/>
    <module name="OperatorWrap"/>
    <module name="ParenPad"/>
    <module name="TypecastParenPad"/>
    <module name="WhitespaceAfter"/>
    <module name="WhitespaceAround"/>

    <!-- Modifier Checks                                    -->
    <!-- See http://checkstyle.sf.net/config_modifiers.html -->
    <module name="ModifierOrder"/>
    <module name="RedundantModifier"/>

    <!-- Checks for blocks. You know, those {}'s         -->
    <!-- See http://checkstyle.sf.net/config_blocks.html -->
    <module name="AvoidNestedBlocks"/>
    <module name="EmptyBlock"/>
    <module name="LeftCurly"/>
    <module name="NeedBraces"/>
    <module name="RightCurly"/>

    <!-- Checks for common coding problems               -->
    <!-- See http://checkstyle.sf.net/config_coding.html -->
    <module name="DefaultComesLast"/>
    <module name="EmptyStatement"/>
    <module name="EqualsHashCode"/>
    <module name="ExplicitInitialization"/>
    <module name="HiddenField">
      <property name="ignoreConstructorParameter" value="true"/>
    </module>
    <module name="FallThrough"/>
    <module name="IllegalInstantiation"/>
    <module name="IllegalThrows"/>
    <module name="InnerAssignment"/>
    <module name="MagicNumber"/>
    <module name="MissingSwitchDefault"/>
    <module name="ModifiedControlVariable"/>
    <module name="MultipleVariableDeclarations"/>
    <module name="ParameterAssignment"/>
    <module name="SimplifyBooleanExpression"/>
    <module name="SimplifyBooleanReturn"/>
    <module name="StringLiteralEquality"/>
    <module name="UnnecessaryParentheses"/>

    <!-- Checks for class design                         -->
    <!-- See http://checkstyle.sf.net/config_design.html -->
    <module name="FinalClass"/>
    <module name="HideUtilityClassConstructor"/>
    <module name="InterfaceIsType"/>
    <module name="OneTopLevelClass"/>
    <module name="VisibilityModifier"/>

    <!-- Miscellaneous other checks.                   -->
    <!-- See http://checkstyle.sf.net/config_misc.html -->
    <module name="ArrayTypeStyle"/>
    <module name="FinalParameters"/>
    <module name="TodoComment"/>
    <module name="TrailingComment"/>
    <module name="UpperEll"/>

  </module>

</module>