pmd config file.

pmd.xml

<?xml version="1.0" encoding="UTF-8"?>
<ruleset>
  <description>QP Backend</description>
  <rule ref="rulesets/strictexception.xml/AvoidThrowingNewInstanceOfSameException">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/EmptyInitializer">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/AvoidStringBufferField">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/DoNotThrowExceptionInFinally">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/codesize.xml/TooManyMethods">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/ReturnEmptyArrayRatherThanNull">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/TooFewBranchesForASwitchStatement">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AbstractClassWithoutAnyMethod">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/AvoidMultipleUnaryOperators">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/ClassWithOnlyPrivateConstructorsShouldBeFinal">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/PackageCase">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/unusedcode.xml/UnusedPrivateField">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/unusedcode.xml/UnusedLocalVariable">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/unusedcode.xml/UnusedPrivateMethod">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/unusedcode.xml/UnusedFormalParameter">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/SingularField">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/coupling.xml/CouplingBetweenObjects">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/coupling.xml/ExcessiveImports">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/AvoidInstantiatingObjectsInLoops">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/UseArrayListInsteadOfVector">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/SimplifyStartsWith">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/UseStringBufferForStringAppends">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/UseArraysAsList">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/AvoidArrayLoops">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/UnnecessaryWrapperObjectCreation">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/j2ee.xml/UseProperClassLoader">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/JumbledIncrementer">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/ForLoopShouldBeWhileLoop">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UnnecessaryConversionTemporary">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/ReturnFromFinallyBlock">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UnnecessaryReturn">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UnconditionalIfStatement">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/basic.xml/EmptyStatementNotInLoop">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UnnecessaryFinalModifier">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/CollapsibleIfStatements">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/ClassCastExceptionWithToArray">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/basic.xml/AvoidDecimalLiteralsInBigDecimalConstructor">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UselessOperationOnImmutable">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/basic.xml/MisplacedNullCheck">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/basic.xml/UnusedNullCheckInEquals">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/basic.xml/BrokenNullCheck">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/basic.xml/AvoidUsingOctalValues">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AvoidDeeplyNestedIfStmts">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/SwitchDensity">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/ConstructorCallsOverridableMethod">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/AccessorClassGeneration">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/FinalFieldCouldBeStatic">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/NonStaticInitializer">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/NonCaseLabelInSwitchStatement">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/OptimizableToArrayCall">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/EqualsNull">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/design.xml/ConfusingTernary">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/InstantiationToGetClass">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/IdempotentOperations">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/SimpleDateFormatNeedsLocale">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/ImmutableField">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AvoidProtectedFieldInFinalClass">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AssignmentToNonFinalStatic">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/MissingStaticMethodInNonInstantiatableClass">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/MissingBreakInSwitch">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AvoidInstanceofChecksInCatchClause">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/AbstractClassWithoutAbstractMethod">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/SimplifyConditional">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/CompareObjectsWithEquals">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/UnnecessaryLocalBeforeReturn">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/design.xml/UncommentedEmptyMethod">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/UncommentedEmptyConstructor">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/design.xml/PreserveStackTrace">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/design.xml/UseCollectionIsEmpty">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/sunsecure.xml/MethodReturnsInternalArray">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/sunsecure.xml/ArrayIsStoredDirectly">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/AvoidCatchingThrowable">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/SignatureDeclareThrowsException">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/ExceptionAsFlowControl">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/AvoidCatchingNPE">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/AvoidThrowingNullPointerException">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/AvoidRethrowingException">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/javabeans.xml/BeanMembersShouldSerialize">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/javabeans.xml/MissingSerialVersionUID">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/StringToString">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strings.xml/InefficientStringBuffering">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strings.xml/UnnecessaryCaseChange">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/UseStringBufferLength">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/AppendCharacterWithChar">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/ConsecutiveLiteralAppends">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/UseIndexOfChar">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/strings.xml/InefficientEmptyStringCheck">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/InsufficientStringBufferDeclaration">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/UselessStringValueOf">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strings.xml/StringBufferInstantiationWithChar">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/codesize.xml/ExcessivePublicCount">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/codesize.xml/TooManyFields">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/logging-jakarta-commons.xml/ProperLogger">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/ShortVariable">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/ShortMethodName">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/AvoidDollarSigns">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/MethodWithSameNameAsEnclosingClass">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/naming.xml/SuspiciousHashcodeMethodName">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/naming.xml/SuspiciousConstantFieldName">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/naming.xml/SuspiciousEqualsMethodName">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/naming.xml/AvoidFieldNameMatchingTypeName">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/AvoidFieldNameMatchingMethodName">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/MisleadingVariableName">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/logging-java.xml/MoreThanOneLogger">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/logging-java.xml/LoggerIsNotStaticFinal">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/logging-java.xml/SystemPrintln">
    <priority>3</priority>
  </rule>
  <rule ref="rulesets/logging-java.xml/AvoidPrintStackTrace">
    <priority>2</priority>
  </rule>
  <rule ref="rulesets/design.xml/EmptyMethodInAbstractClassShouldBeAbstract">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/imports.xml/TooManyStaticImports">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/j2ee.xml/DoNotCallSystemExit">
    <priority>1</priority>
  </rule>
  <rule ref="rulesets/j2ee.xml/StaticEJBFieldShouldBeFinal">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/j2ee.xml/DoNotUseThreads">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/strictexception.xml/DoNotExtendJavaLangError">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/optimizations.xml/AddEmptyString">
    <priority>4</priority>
  </rule>
  <rule ref="rulesets/naming.xml/BooleanGetMethodName">
    <priority>4</priority>
  </rule>
</ruleset>