Add Checkstyle

Author: Korbik

pom.xml

@@ -23,6 +23,7 @@
         <nexus-staging-maven.version>1.6.7</nexus-staging-maven.version>
         <build-helper-maven.version>3.0.0</build-helper-maven.version>
         <maven-compiler-plugin.version>3.10.0</maven-compiler-plugin.version>
+        <maven-checkstyle-plugin.version>3.6.0</maven-checkstyle-plugin.version>
 
         <!-- dependencies -->
         <protobuf.version>3.25.5</protobuf.version>
@@ -36,6 +37,8 @@
 
         <!-- test dependencies -->
         <junit.version>5.8.2</junit.version>
+
+        <checkstyle.config.location>checkstyle.xml</checkstyle.config.location>
     </properties>
 
     <licenses>
@@ -249,6 +252,23 @@
         </plugins>
     </build>
 
+    <reporting>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>3.6.0</version>
+                <reportSets>
+                    <reportSet>
+                        <reports>
+                            <report>checkstyle</report>
+                        </reports>
+                    </reportSet>
+                </reportSets>
+            </plugin>
+        </plugins>
+    </reporting>
+
     <dependencies>
         <dependency>
             <groupId>com.google.protobuf</groupId>