Adding groovy-eclipse to Maven project

pom.xml

<...>
	<dependencies>
		<dependency>
			<groupId>org.codehaus.groovy</groupId>
			<artifactId>groovy-all</artifactId>
			<version>1.8.6</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.5.1</version>
				<configuration>
					<source>1.6</source>
					<target>1.6</target>
					<compilerId>groovy-eclipse-compiler</compilerId>
					<verbose>false</verbose>
				</configuration>
				<dependencies>
					<dependency>
						<groupId>org.codehaus.groovy</groupId>
						<artifactId>groovy-eclipse-compiler</artifactId>
						<version>2.7.0-01</version>
					</dependency>
					<dependency>
						<groupId>org.codehaus.groovy</groupId>
						<artifactId>groovy-eclipse-batch</artifactId>
						<version>2.0.4-04</version>
					</dependency>
				</dependencies>
			</plugin>
		</plugins>
	</build>
<...>