docs: update delegation

delegation/src/main/java/com/iluwatar/delegation/simple/App.java

@@ -38,9 +38,9 @@ import com.iluwatar.delegation.simple.printers.HpPrinter;
  *
  * <p>In this example the delegates are {@link EpsonPrinter}, {@link HpPrinter} and {@link
  * CanonPrinter} they all implement {@link Printer}. The {@link PrinterController} class also
- * implements {@link Printer}. However neither provide the functionality of {@link Printer} by
+ * implements {@link Printer}. However, neither provide the functionality of {@link Printer} by
  * printing to the screen, they actually call upon the instance of {@link Printer} that they were
- * instantiated with. Therefore delegating the behaviour to another class.
+ * instantiated with. Therefore, delegating the behaviour to another class.
  */
 public class App {
 

delegation/src/main/java/com/iluwatar/delegation/simple/PrinterController.java

@@ -27,7 +27,7 @@ package com.iluwatar.delegation.simple;
 /**
  * Delegator Class to delegate the implementation of the Printer. This ensures two things: - when
  * the actual implementation of the Printer class changes the delegation will still be operational -
- * the actual benefit is observed when there are more than one implementors and they share a
+ * the actual benefit is observed when there are more than one implementor, and they share a
  * delegation control
  */
 public class PrinterController implements Printer {
@@ -41,7 +41,7 @@ public class PrinterController implements Printer {
   /**
    * This method is implemented from {@link Printer} however instead on providing an implementation,
    * it instead calls upon the class passed through the constructor. This is the delegate, hence the
-   * pattern. Therefore meaning that the caller does not care of the implementing class only the
+   * pattern. Therefore, meaning that the caller does not care of the implementing class only the
    * owning controller.
    *
    * @param message to be printed to the screen

delegation/src/main/java/com/iluwatar/delegation/simple/printers/EpsonPrinter.java

@@ -28,7 +28,7 @@ import com.iluwatar.delegation.simple.Printer;
 import lombok.extern.slf4j.Slf4j;
 
 /**
- * Specialised Implementation of {@link Printer} for a Epson Printer, in this case the message to be
+ * Specialised Implementation of {@link Printer} for an Epson Printer, in this case the message to be
  * printed is appended to "Epson Printer : ".
  *
  * @see Printer

delegation/src/main/java/com/iluwatar/delegation/simple/printers/HpPrinter.java

@@ -28,7 +28,7 @@ import com.iluwatar.delegation.simple.Printer;
 import lombok.extern.slf4j.Slf4j;
 
 /**
- * Specialised Implementation of {@link Printer} for a HP Printer, in this case the message to be
+ * Specialised Implementation of {@link Printer} for an HP Printer, in this case the message to be
  * printed is appended to "HP Printer : ".
  *
  * @see Printer

delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java

@@ -35,7 +35,6 @@ class AppTest {
 
   /**
    * Issue: Add at least one assertion to this test case.
-   *
    * Solution: Inserted assertion to check whether the execution of the main method in {@link App#main(String[])}
    * throws an exception.
    */

delegation/src/test/java/com/iluwatar/delegation/simple/DelegateTest.java

@@ -59,7 +59,7 @@ class DelegateTest {
   private static final String MESSAGE = "Test Message Printed";
 
   @Test
-  void testCanonPrinter() throws Exception {
+  void testCanonPrinter() {
     var printerController = new PrinterController(new CanonPrinter());
     printerController.print(MESSAGE);
 
@@ -67,7 +67,7 @@ class DelegateTest {
   }
 
   @Test
-  void testHpPrinter() throws Exception {
+  void testHpPrinter() {
     var printerController = new PrinterController(new HpPrinter());
     printerController.print(MESSAGE);
 
@@ -75,7 +75,7 @@ class DelegateTest {
   }
 
   @Test
-  void testEpsonPrinter() throws Exception {
+  void testEpsonPrinter() {
     var printerController = new PrinterController(new EpsonPrinter());
     printerController.print(MESSAGE);