add javadoc

src/main/java/core/gui/LearningView.java

@@ -2,6 +2,9 @@ package core.gui;
 
 import java.util.List;
 
+/**
+ * Switched out Views have to implement this interface.
+ */
 public interface LearningView {
     void repaintEnvironment();
     void updateLearningInfoPanel();

src/main/java/core/gui/View.java

@@ -61,7 +61,7 @@ public class View<A extends Enum> implements LearningView{
         fileMenu.add(new JMenuItem(new AbstractAction("Save") {
             @Override
             public void actionPerformed(ActionEvent e) {
-                String fileName = JOptionPane.showInputDialog("Enter file name", "save");
+                String fileName = JOptionPane.showInputDialog("Enter file name", "path/to/file");
                 if(fileName != null){
                     viewListener.onSaveState(fileName);
                 }

src/main/java/core/gui/Visualizable.java

@@ -2,6 +2,13 @@ package core.gui;
 
 import javax.swing.*;
 
+/**
+ * Classes that implement this interface are able to create a visual component
+ * that can be utilized and displayed by the view. It is optional for an environment
+ * to defined a GUI (View is checking it via "instance of").
+ * Furthermore a state implement this interface, so it can be displayed from the
+ * state-action-table.
+ */
 public interface Visualizable {
     JComponent visualize();
 }