How to compile mavenized OSGi 4.3 bundle with OpenJDK 7?

i am trying to compile my OSGi bundle against OSGi specification 4.3 using OpenJDK7 but i am getting error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5:compile (default-compile) on project example: Compilation failure
[ERROR] /tmp/baka/example/src/main/java/org/example/Activator.java:[14,24] error: type ServiceReference does not take parameters

here is my Activator.java:

package org.example;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

public class Activator implements BundleActivator {
    @Override
    public void start(BundleContext bundleContext) throws Exception {
        ServiceReference<Runnable> ref = bundleContext.getServiceReference(Runnable.class);
    }

    @Override
    public void stop(BundleContext bundleContext) throws Exception {
    }
}

and my 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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>example</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>bundle</packaging>

    <name>example</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.core</artifactId>
            <version>4.3.0</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>