pom.xml

<build>
		<plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-checkstyle-plugin</artifactId>
                <version>3.1.2</version>
                <dependencies>
                    <!-- sets the desired version of checkstyle -->
                    <dependency>
                        <groupId>com.puppycrawl.tools</groupId>
                        <artifactId>checkstyle</artifactId>
                        <version>8.42</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <configLocation>checkstyle.xml</configLocation>
                    <includeTestSourceDirectory>true</includeTestSourceDirectory>
                    <consoleOutput>true</consoleOutput>
                    <failOnViolation>true</failOnViolation>
                    <logViolationsToConsole>true</logViolationsToConsole>
                    <violationSeverity>warning</violationSeverity>
                    <linkXRef>false</linkXRef>
                </configuration>
                <executions>
                    <execution>
                        <id>checkstyle_validation</id>
                        <phase>validate</phase>
                        <goals>
                            <goal>check</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
		</plugins>
	</build>