Add PMD rules into your project

pom.xml

<properties>
             <pmd.failOnViolation>true</pmd.failOnViolation>
</properties>
<plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-pmd-plugin</artifactId>
            <version>3.1</version>
            <executions>
              <execution>
                <id>pmd</id>
                <phase>verify</phase>
                <goals>
                  <goal>pmd</goal>
                  <goal>check</goal>
                  <goal>cpd</goal>
                  <goal>cpd-check</goal>
                </goals>
              </execution>
            </executions>
            <configuration>
              <rulesets>
                <ruleset>target/classes/tps_standard_pmd_ruleset.xml</ruleset>
              </rulesets>
              <format>xml</format>
              <sourceEncoding>UTF-8</sourceEncoding>
              <targetJdk>${java.version}</targetJdk>
              <failOnViolation>${pmd.failOnViolation}</failOnViolation>
              <failurePriority>3</failurePriority>
              <excludes>
                    <exclude>**/*Bean.java</exclude>
                    <exclude>**/generated/*.java</exclude>
              </excludes>
            </configuration>
            <inherited>true</inherited>
          </plugin>

tps_standard_pmd_ruleset.xml

<?xml version="1.0"?>
<!-- ####################-->
<!-- Standard set of PMD rules to be applied & checked in all Pragthink projects -->
<!-- ####################-->

<ruleset name="Custom ruleset"
    xmlns="http://pmd.sf.net/ruleset/1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
   <description>
      This ruleset checks my code for bad stuff
   </description>

   <rule ref="rulesets/java/strings.xml">
      <exclude name="InefficientStringBuffering"/>
   </rule>
  
   <rule ref="rulesets/java/controversial.xml">
      <exclude name="OnlyOneReturn"/>
      <exclude name="AvoidFinalLocalVariable"/>
      <exclude name="AtLeastOneConstructor"/>
      <exclude name="DataflowAnomalyAnalysis"/>
      <exclude name="UnusedModifier"/>
      <exclude name="CallSuperInConstructor"/>
      <exclude name="AssignmentInOperand"/>
      <exclude name="UseConcurrentHashMap"/>
   </rule>

   <rule ref="rulesets/java/naming.xml">
      <exclude name="LongVariable"/>
      <exclude name="ShortMethodName"/>
      <exclude name="ShortVariable"/>
      <exclude name="AbstractNaming"/>
   </rule>
  
   <rule ref="rulesets/java/logging-java.xml"/>
  
   <rule ref="rulesets/java/logging-jakarta-commons.xml">
      <exclude name="ProperLogger"/>
   </rule>
  
   <rule ref="rulesets/java/sunsecure.xml">
      <exclude name="ArrayIsStoredDirectly"/>
   </rule>
  
   <rule ref="rulesets/java/optimizations.xml">
      <exclude name="SimplifyStartsWith"/>
      <exclude name="AvoidInstantiatingObjectsInLoops"/>
      <exclude name="LocalVariableCouldBeFinal"/>
      <exclude name="MethodArgumentCouldBeFinal"/>
   </rule>
  
   <rule ref="rulesets/java/junit.xml"/>
  
   <rule ref="rulesets/java/design.xml">
      <exclude name="ImmutableField"/>
      <exclude name="AvoidDeeplyNestedIfStmts"/>
      <exclude name="ClassWithOnlyPrivateConstructorsShouldBeFinal"/>
      <exclude name="UncommentedEmptyConstructor"/>
      <exclude name="UnnecessaryLocalBeforeReturn"/>
      <exclude name="ConfusingTernary"/>
      <exclude name="AvoidReassigningParameters"/>
      <exclude name="SingularField"/>
   </rule>
   <rule ref="rulesets/java/design.xml/ConstructorCallsOverridableMethod">
      <priority>4</priority>
   </rule>
   <rule ref="rulesets/java/design.xml/AvoidInstanceofChecksInCatchClause">
      <priority>4</priority>
   </rule>
  
   <rule ref="rulesets/java/strictexception.xml">
       <exclude name="AvoidThrowingNullPointerException"/>
   </rule>
  
   <rule ref="rulesets/java/javabeans.xml">
      <exclude name="BeanMembersShouldSerialize"/>
   </rule>
  
   <rule ref="rulesets/java/clone.xml"/>
   <rule ref="rulesets/java/finalizers.xml"/>
   <rule ref="rulesets/java/imports.xml"/>

   <rule ref="rulesets/java/coupling.xml">
      <exclude name="ExcessiveImports"/>
      <exclude name="LawOfDemeter"/>
   </rule>

   <rule ref="rulesets/java/codesize.xml">
      <exclude name="TooManyMethods"/>
      <exclude name="TooManyFields"/>
      <exclude name="ExcessivePublicCount"/>
   </rule>
   <rule ref="rulesets/java/braces.xml"/>
   <rule ref="rulesets/java/basic.xml">
      <exclude name="CollapsibleIfStatements"/>
   </rule>
   <rule ref="rulesets/java/basic.xml/EmptyIfStmt">
         <priority>4</priority>
   </rule>
 
   <rule ref="rulesets/java/unusedcode.xml">
      <exclude name="UnusedFormalParameter"/>
      <exclude name="UnusedLocalVariable"/>
   </rule>
</ruleset>