pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
    http://maven.apache.org/maven-v4_0_0.xsd ">
   <modelVersion>4.0.0</modelVersion>

   <groupId>org.geoserver</groupId>
   <artifactId>hello_wps</artifactId>
   <packaging>jar</packaging>
   <version>2.8-SNAPSHOT</version>
   <name>hello_wps</name>

   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <gt.version>14-SNAPSHOT</gt.version>  <!-- change to GeoTools version -->
     <gs.version>2.8-SNAPSHOT</gs.version>  <!-- change to GeoServer version -->
   </properties>
   <dependencies>
     <dependency>
       <groupId>org.geotools</groupId>
       <artifactId>gt-process</artifactId>
       <version>${gt.version}</version>
     </dependency>
     <dependency>
       <groupId>org.geoserver.extension</groupId>
       <artifactId>gs-wps-core</artifactId>
       <version>${gs.version}</version>
     </dependency>
     <dependency>
       <groupId>org.geoserver</groupId>
       <artifactId>gs-main</artifactId>
       <version>${gs.version}</version>
       <classifier>tests</classifier>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.geoserver.extension</groupId>
       <artifactId>gs-wps-core</artifactId>
       <version>${gs.version}</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.11</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.mockrunner</groupId>
       <artifactId>mockrunner</artifactId>
       <version>0.3.6</version>
      <scope>test</scope>
     </dependency>
   </dependencies>

   <build>
     <plugins>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
           <source>1.6</source>
           <target>1.6</target>
         </configuration>
      </plugin>
    </plugins>
   </build>

    <repositories>
        <repository>
            <id>boundless</id>
            <name>Boundless Maven Repository</name>
            <url>http://repo.boundlessgeo.com/main</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>geotools</id>
            <name>geotools</name>
            <url>http://download.osgeo.org/webdav/geotools</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>

</project>

Nice pom