Can I create DB connection manually from plugin?

Hello.

I want to automatically creating DB connection from my plugin, but cannot find some documentation how can I do that for official DB management plugin in IDEA Ultimate.

I've investigate some code and find jar of plugin in <user_idea_dir>/config/plugins/DBNavigator/dbn.jar

1) Include dbn.jar to project as provided library

2) Add to plugins.xml dependency and action:

<depends>com.intellij.modules.database</depends>

<actions>
    <!-- Add your actions here -->
    <group id="SpconfigPlugin.SampleMenu" text="_Sample Menu" description="Sample menu">
        <add-to-group group-id="MainMenu" anchor="last"/>
        <action id="SpconfigPlugin.Menu" class="Menu" text="SPConfig" description="Spconfig!!!">
        </action>
    </group>

</actions>

3) In Action wrote something like this (just for example, that code should open window that allow to configure new PostgreSQL connection

import com.dci.intellij.dbn.connection.DatabaseType;
import com.dci.intellij.dbn.connection.config.ConnectionConfigType;
import com.dci.intellij.dbn.options.ProjectSettingsManager;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.project.Project;

/**
 * Created by mds on 29.03.17.
 */
public class Menu extends AnAction {

    @Override
    public void actionPerformed(AnActionEvent event) {
        Project project = event.getData(PlatformDataKeys.PROJECT);
        if (project != null) {
            ProjectSettingsManager settingsManager = ProjectSettingsManager.getInstance(project);
            ConnectionConfigType configType = ConnectionConfigType.BASIC;

            settingsManager.createConnection(DatabaseType.POSTGRES, configType);
        }
    }
}

After compile and running I've got an Exceptions - ClassDefNotFound for com.dci.* packages.

In final solution I just want add new Postgres connection to DB list with specified parameters.