<build>

    <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>6</source>

                    <target>6</target>

                    <encoding>utf8</encoding>

                </configuration>

            </plugin>

      </plugins>

</build>