remove old interface and add javadoc to java worker

src/main/java/io/bioimage/modelrunner/tensorflow/v2/api030/JavaWorker.java

@@ -21,7 +21,13 @@ public class JavaWorker {
 	private final Tensorflow2Interface ti;
 
 	private boolean cancelRequested = false;
-
+
+	/**
+	 * Method in the child process that is in charge of keeping the process open and calling the model load,
+	 * model inference and model closing
+	 * @param args
+	 * 	args of the parent process
+	 */
 	public static void main(String[] args) {
 
     	try(Scanner scanner = new Scanner(System.in)){

src/main/java/io/bioimage/modelrunner/tensorflow/v2/api030/Tensorflow2Interface.java

@@ -176,7 +176,7 @@ public void loadModel(String modelFolder, String modelSource)
 		try {
 			checkModelUnzipped();
 		} catch (Exception e) {
-			throw new LoadModelException(e.toString());
+			throw new LoadModelException(Types.stackTrace(e));
 		}
 		model = SavedModelBundle.load(this.modelFolder, "serve");
 		byte[] byteGraph = model.metaGraphDef().toByteArray();
@@ -185,7 +185,7 @@ public void loadModel(String modelFolder, String modelSource)
 				"serving_default");
 		}
 		catch (InvalidProtocolBufferException e) {
-			System.out.println("Invalid graph");
+			throw new LoadModelException(Types.stackTrace(e));
 		}
 	}