checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">

    <module name="FileTabCharacter"/>

    <module name="LineLength">
        <property name="max" value="160"/>
        <property name="ignorePattern" value="@version|@see|\w*_CLASS"/>
    </module>

    <module name="TreeWalker">
        <!-- allow usage of CHECKSTYLE:OFF and CHECKSTYLE:ON -->
        <module name="SuppressionCommentFilter"/>

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


        <!-- Checks for Naming Conventions.                  -->
        <!-- See http://checkstyle.sf.net/config_naming.html -->
        <module name="MemberName">
            <property name="format" value="^[a-z_](_?[a-zA-Z0-9]+)*$"/>
        </module>

        <module name="ConstantName">
            <!-- Normal rules, except that:
            -  * any name can start with an underscore.
            -  * "log" is allowed; this is a traditional name for log objects
            -  * names ending with "ThreadLocal" are allowed so that threadlocal vars don't have to be
            -    all-caps. They are static final, but are not really constants. Yes, type prefixes
            -    on variable names sucks ("hungarian notation") but checkstyle doesn't allow
            -    name rules to vary by the type of the constant, and no other alternative seems
            -    any better.
            -->
            <property name="format"
                      value="^(([a-z][a-zA-Z]*ThreadLocal)|([A-Z][A-Z0-9]*(_[A-Z0-9]+)*))$"/>
        </module>

        <module name="LocalVariableName">
            <property name="format" value="^[a-z_](_?[a-zA-Z0-9]+)*$"/>
        </module>
        <module name="MethodName"/>
        <module name="PackageName"/>
        <module name="LocalFinalVariableName"/>
        <module name="ParameterName">
            <property name="format" value="^[a-z_](_?[a-zA-Z0-9]+)*$"/>
        </module>
        <module name="StaticVariableName"/>
        <module name="TypeName">
            <property name="format" value="^[A-Z][a-zA-Z0-9_]*$" />
        </module>

        <module name="IllegalImport"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>

        <module name="ModifierOrderCheck" />
		
		<module name="HideUtilityClassConstructor"/>

        <module name="MethodLength">
            <property name="max" value="300" />
        </module>
        <module name="ParameterNumber">
            <property name="max" value="10" />
        </module>

        <module name="NeedBraces">
            <property name="allowSingleLineStatement" value="true" />
        </module>
        <module name="LeftCurly">
        </module>
        <module name="RightCurly">
            <property name="option" value="alone"/>
        </module>

        <module name="WhitespaceAfter" />
        <module name="NoWhitespaceAfter" />

        <!-- Checks for common coding problems               -->
        <!-- See http://checkstyle.sf.net/config_coding.html -->
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="InnerAssignment"/>
        <module name="DefaultComesLast"/>
        <module name="FallThrough"/>

        <!-- Checks for class design                         -->
        <!-- See http://checkstyle.sf.net/config_design.html -->
        <!-- module name="DesignForExtension"/ -->
        <module name="com.puppycrawl.tools.checkstyle.checks.design.DesignForExtensionCheck">
            <property name="severity" value="ignore"/>
        </module>

        <!-- module name="FinalClass"/ -->
        <!-- module name="HideUtilityClassConstructor"/ -->
        <!-- module name="InterfaceIsType"/ -->
        <!-- module name="VisibilityModifier"/ -->
        <module name="com.puppycrawl.tools.checkstyle.checks.design.VisibilityModifierCheck">
            <property name="packageAllowed" value="false"/>
            <property name="protectedAllowed" value="true"/>
            <property name="publicMemberPattern" value="^serialVersionUID"/>
            <property name="severity" value="warning"/>
        </module>


        <module name="Regexp">
            <property name="format" value="[ \t]+$"/>
            <property name="illegalPattern" value="true"/>
            <property name="message" value="Trailing whitespace"/>
        </module>


        <!-- Miscellaneous other checks.                   -->
        <!-- See http://checkstyle.sf.net/config_misc.html -->
        <!-- module name="FinalParameters"/ -->
        <!-- Line with Trailing Spaces (disabled as it's to noisy)
      <module name="GenericIllegalRegexp">
          <property name="format" value="\s+$"/>
          <property name="message" value="Line has trailing spaces."/>
      </module>
        -->
        <module name="UpperEll"/>
		
		<module name="ArrayTypeStyle"/>

        <module name="WhitespaceAround">
            <property name="tokens" value=""/>
        </module>
        <module name="StringLiteralEquality"/>
        <module name="NoFinalizer"/>
        <module name="MissingOverride"/>
        <module name="DeclarationOrder"/>
        <!--module name="MultipleStringLiterals"/-->
        <module name="OneStatementPerLine"/>
        <module name="Indentation"/>
    </module>

</module>