Mongodb dependency returns class not found

[Eman Cauchi]

I have a custom add-on with which I need to connect to a MongoDB instance to. I have put the following dependencies in my pom file: 

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.7.0</version>
    <scope>compile</scope>
</dependency>
<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>bson</artifactId>
    <version>3.7.0</version>
    <scope>compile</scope>
</dependency>

I have also added the mongodb packages in the <Import-Package>

<Import-Package>
    org.springframework.osgi.*;resolution:="optional",
    org.eclipse.gemini.blueprint.*;resolution:="optional",
    org.bson.*;resolution:="optional",
    com.mongodb.*;resolution:="optional", *
</Import-Package>

What am I doing wrong. Why does it still return the below error?

java.lang.NoClassDefFoundError: com/mongodb/MongoException