Use fmt-maven-plugin to check source complies with the Google Java St…

…yle Guide.

(If it doesn't the author can manually type 'mvn fmt:format' to reformat,
or manually reformat in the IDE.)

.travis.yml

@@ -13,7 +13,7 @@ before_install:
   - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts | sudo tee /etc/hosts
   - cat /etc/hosts # optionally check the content *after*
 
-script: mvn clean test jacoco:report
+script: mvn clean fmt:check test jacoco:report
 
 after_success:
   - python scripts/deploy/addServerToM2Settings.py

pom.xml

@@ -121,6 +121,18 @@
             </plugins>
         </pluginManagement>
         <plugins>
+            <plugin>
+                <groupId>com.coveo</groupId>
+                <artifactId>fmt-maven-plugin</artifactId>
+                <version>2.2.0</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-release-plugin</artifactId>