maven protobuf

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
                <executions>
                    <execution>
                        <!--We need to overwrite the default-resources execution
                        to run in the generate-sources phase otherwise the proto
                        plugin runs and there are no files to compile.-->
                        <id>default-resources</id>
                        <goals>
                            <goal>resources</goal>
                        </goals>
                        <phase>generate-sources</phase>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>com.google.protobuf.tools</groupId>
                <artifactId>maven-protoc-plugin</artifactId>
                <version>0.3.2</version>
                <configuration>
                    <!-- This protocExecutable is empty so each dev must have the protoc executable on their path.-->
                    <protocExecutable></protocExecutable>
                    <!-- This is the dir where the resources plugin drops the replaced .proto files.-->
                    <protoSourceRoot>target/classes</protoSourceRoot>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/proto</directory>
                <filtering>true</filtering>
                <includes>
                    <include>**/*.proto</include>
                </includes>
            </resource>
        </resources>
    </build>

    <dependencies>
        <dependency>
            <groupId>com.google.protobuf</groupId>
            <artifactId>protobuf-java</artifactId>
            <version>2.5.0</version>
        </dependency>
    </dependencies>

    <profiles>
        <profile>
            <id>server</id>
            <properties>
                <proto.optimize_for>SPEED</proto.optimize_for>
            </properties>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
        </profile>
        <profile>
            <id>client</id>
            <properties>
                <proto.optimize_for>LITE_RUNTIME</proto.optimize_for>
            </properties>
            <build>
                <pluginManagement>
                    <plugins>
                        <plugin>
                            <groupId>org.apache.maven.plugins</groupId>
                            <artifactId>maven-compiler-plugin</artifactId>
                            <version>3.1</version>
                            <configuration>
                                <source>1.6</source>
                                <target>1.6</target>
                                <encoding>${project.build.sourceEncoding}</encoding>
                            </configuration>
                        </plugin>
                    </plugins>
                </pluginManagement>
            </build>
        </profile>
    </profiles>