When creating an ILcdModel for a single WCS coverage, you can skip the creation of a TLcdWCSDataSource by specifying the needed coverage directly in the server URL: 

String serverURL = "https://sampleservices.luciad.com/wcs";
String coverageName = "world_elevation_6714a770-860b-4878-90c9-ab386a4bae0f";

//Concat the url and layer name to a single string
String sourceName = String.format("%s?data=%s", serverURL, coverageName);

//Decode the model
ILcdModelDecoder decoder = new TLcdWCSCoverageModelDecoder();
ILcdModel model = decoder.decode(sourceName);

is the equivalent of

String serverURL = "https://sampleservices.luciad.com/wcs";
String coverageName = "world_elevation_6714a770-860b-4878-90c9-ab386a4bae0f";

//Create the data source
TLcdWCSDataSource dataSource = TLcdWCSDataSource.newBuilder()
                                                .uri(serverURL)
                                                .coverageName(coverageName)
                                                .build();

//Decode the model
ILcdModelDecoder decoder = new TLcdWCSCoverageModelDecoder();
ILcdModel model = decoder.decodeSource(dataSource);