Implement Checkstyle

Author: Konloch

pom.xml

@@ -398,6 +398,14 @@
 
     <build>
         <plugins>
+	        <plugin>
+		        <groupId>org.apache.maven.plugins</groupId>
+		        <artifactId>maven-checkstyle-plugin</artifactId>
+		        <version>3.5.0</version>
+            <configuration>
+              <configLocation>checkstyle.xml</configLocation>
+            </configuration>
+          </plugin>
 	        <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>