Update docs

src/main/java/app/controllers/MenubarController.java

@@ -35,7 +35,7 @@ import javafx.scene.control.ToggleGroup;
 import javafx.stage.Stage;
 
 /**
- * A FXML controller that controls the menubar component of the UI
+ * A FXML controller that controls the MenuBar
  */
 public class MenubarController implements Initializable, Controller {
 

src/main/java/app/controllers/ModelineController.java

@@ -15,7 +15,7 @@ import javafx.fxml.Initializable;
 import javafx.scene.control.Label;
 
 /**
- * A FXML controller that controls the modeline component of the UI
+ * A FXML controller that controls the Modeline
  */
 public class ModelineController implements Initializable, Controller {
 

src/main/java/app/events/SaveFileEvent.java

@@ -2,6 +2,9 @@ package app.events;
 
 import app.model.Model;
 
+/**
+ * Event signalizing that the current file should be saved to disk
+ */
 public class SaveFileEvent extends Event {
 
     private boolean isNewFile;

src/main/java/app/service/FileOperations.java

@@ -11,6 +11,9 @@ import java.util.Scanner;
 import app.model.Model;
 import javafx.stage.Stage;
 
+/**
+ * A class containing operations and logic for choosing, reading and writing to files.
+ */
 public class FileOperations {
 
   private FileOperations() {}

src/main/java/app/service/FiletreeOperations.java

@@ -16,6 +16,9 @@ import javafx.scene.control.TreeItem;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 
+/**
+ * A class containing operations for handling files withing a GUI filetree
+ */
 public class FiletreeOperations {
 
   private static int iconSize = 20;