public String getEngine() {
        return this.engine;
    }
<p>
The database engine to use for this DB cluster.
</p>
<p>
Valid for Cluster Type: Aurora DB clusters and Multi-AZ DB clusters
</p>
<p>
Valid Values:
</p>
<ul>
<li>
<p>
<code>aurora-mysql</code>
</p>
</li>
<li>
<p>
<code>aurora-postgresql</code>
</p>
</li>
<li>
<p>
<code>mysql</code>
</p>
</li>
<li>
<p>
<code>postgres</code>
</p>
</li>
<li>
<p>
<code>neptune</code> - For information about using Amazon Neptune, see the <a
href="https://docs.aws.amazon.com/neptune/latest/userguide/intro.html"> <i>Amazon Neptune User Guide</i> </a>.
</p>
</li>
</ul>

@return The database engine to use for this DB cluster.</p>
        <p>
        Valid for Cluster Type: Aurora DB clusters and Multi-AZ DB clusters
        </p>
        <p>
        Valid Values:
        </p>
        <ul>
        <li>
        <p>
        <code>aurora-mysql</code>
        </p>
        </li>
        <li>
        <p>
        <code>aurora-postgresql</code>
        </p>
        </li>
        <li>
        <p>
        <code>mysql</code>
        </p>
        </li>
        <li>
        <p>
        <code>postgres</code>
        </p>
        </li>
        <li>
        <p>
        <code>neptune</code> - For information about using Amazon Neptune, see the <a
        href="https://docs.aws.amazon.com/neptune/latest/userguide/intro.html"> <i>Amazon Neptune User Guide</i>
        </a>.
        </p>
        </li>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBClusterRequest.java