GUAC-1193: Create connection history interface, and add simple implementation.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/user/UserContext.java

@@ -39,8 +39,10 @@ import org.glyptodon.guacamole.net.auth.ActiveConnection;
 import org.glyptodon.guacamole.net.auth.AuthenticationProvider;
 import org.glyptodon.guacamole.net.auth.Connection;
 import org.glyptodon.guacamole.net.auth.ConnectionGroup;
+import org.glyptodon.guacamole.net.auth.ConnectionRecordSet;
 import org.glyptodon.guacamole.net.auth.Directory;
 import org.glyptodon.guacamole.net.auth.User;
+import org.glyptodon.guacamole.net.auth.simple.SimpleConnectionRecordSet;
 
 /**
  * UserContext implementation which is driven by an arbitrary, underlying
@@ -136,6 +138,12 @@ public class UserContext extends RestrictedObject
         return activeConnectionDirectory;
     }
 
+    @Override
+    public ConnectionRecordSet getConnectionHistory()
+            throws GuacamoleException {
+        return new SimpleConnectionRecordSet();
+    }
+
     @Override
     public ConnectionGroup getRootConnectionGroup() throws GuacamoleException {