Added authors and update CONTRIBUTING.MD

Author: tboychuk

0-0-intro/src/main/java/com/bobocode/intro/Introduction.java

@@ -13,6 +13,8 @@
  * <p>
  * Throughout the course you will need to implement hundreds of methods. And this is a simple example of how it's all
  * organized. You read the Java Doc, implement a method and run the test.
+ *
+ * @author Taras Boychuk
  */
 public class Introduction {
     /**

0-0-intro/src/test/java/com/bobocode/intro/IntroductionTest.java

@@ -18,6 +18,8 @@
  * PLEASE NOTE:
  * - annotation @{@link Order} is used to help you to understand which method should be implemented first.
  * - annotation @{@link DisplayName} is used to provide you more detailed instructions.
+ *
+ * @author Taras Boychuk
  */
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 class IntroductionTest {

1-0-java-basics/1-3-1-crazy-generics/src/main/java/com/bobocode/basics/CrazyGenerics.java

@@ -19,6 +19,8 @@
  * Hint: in some cases you will need to refactor the code, like replace {@link Object} with a generic type. In order
  * cases you will need to add new fields, create new classes, or add new methods. Always try to read java doc and update
  * the code according to it.
+ *
+ * @author Taras Boychuk
  */
 public class CrazyGenerics {
     /**

1-0-java-basics/1-3-1-crazy-generics/src/test/java/com/bobocode/basics/CrazyGenericsTest.java

@@ -26,8 +26,11 @@
 import static org.mockito.Mockito.when;
 
 /**
- * This test class uses Reflection API only for learning purposes. It should NOT be used as an example of how to write
- * production tests.
+ * A reflection-based test class for {@link CrazyGenerics}.
+ * <p>
+ * PLEASE NOTE: we use Reflection API only for learning purposes. It should NOT be used for production tests.
+ *
+ * @author Taras Boychuk
  */
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 public class CrazyGenericsTest {

1-0-java-basics/1-5-0-hello-annotations/src/main/java/com/bobocode/basics/HelloAnnotationsExercise.java

@@ -8,6 +8,8 @@
  * todo: Create an annotation @{@link Exercise}.
  * todo: Add String value that will store exercise name
  * todo: Add complexityLevel with a default {@link Level} basic
+ *
+ * @author Taras Boychuk
  */
 public class HelloAnnotationsExercise { // todo: mark class with the annotation according to the javadoc
 }

2-0-data-structures-and-algorithms/2-2-1-node/src/main/java/com/bobobode/cs/Node.java

@@ -6,6 +6,7 @@
  * objects and build more comprehensive data structures on top of those liked nodes.
  *
  * @param <T> a generic type T
+ * @author Taras Boychuk
  */
 public class Node<T> {
     // todo:

2-0-data-structures-and-algorithms/2-2-1-node/src/main/java/com/bobobode/cs/Nodes.java

@@ -4,6 +4,8 @@
 
 /**
  * A class that consists of static methods only and provides util methods for {@link Node}.
+ *
+ * @author Taras Boychuk
  */
 public class Nodes {
     private Nodes() {

2-0-data-structures-and-algorithms/2-2-2-stack/src/main/java/com/bobocode/cs/LinkedStack.java

@@ -8,6 +8,8 @@
  * A node is implemented as inner static class {@link Node<T>}.
  *
  * @param <T> generic type parameter
+ * @author Taras Boychuk
+ * @author Serhii Hryhus
  */
 public class LinkedStack<T> implements Stack<T> {
 

2-0-data-structures-and-algorithms/2-2-2-stack/src/main/java/com/bobocode/cs/Stack.java

@@ -6,6 +6,8 @@
  * custom linked nodes)
  *
  * @param <T> type parameter
+ * @author Taras Boychuk
+ * @author Serhii Hryhus
  */
 public interface Stack<T> {
 

2-0-data-structures-and-algorithms/2-2-2-stack/src/test/java/com/bobocode/cs/StackTest.java renamed to 2-0-data-structures-and-algorithms/2-2-2-stack/src/test/java/com/bobocode/cs/LinkedStackTest.java

@@ -13,18 +13,33 @@
 import static org.assertj.core.api.Assertions.assertThatNullPointerException;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
+/**
+ * A reflection-based test class for {@link LinkedStack}.
+ * <p>
+ * PLEASE NOTE: we use Reflection API only for learning purposes. It should NOT be used for production tests.
+ *
+ * @author Ivan Virchenko
+ * @author Taras Boychuk
+ */
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
-class StackTest {
-
+class LinkedStackTest {
     private static final String PROPER_CLASSNAME = "Node";
 
-    private static final Predicate<Field> NODE_FIELD_PREDICATE = field -> field.getType().getSimpleName().equals(PROPER_CLASSNAME)
-            && field.getName().toLowerCase().contains("head") || field.getName().toLowerCase().contains("first");
-    private static final Predicate<Field> SIZE_FIELD_PREDICATE = field -> field.getName().toLowerCase().contains("size");
-    private static final Predicate<Field> NODE_ELEMENT_FIELD = field -> field.getName().toLowerCase().contains("element")
+    private static final Predicate<Field> NODE_FIELD_PREDICATE = field ->
+            field.getType().getSimpleName().equals(PROPER_CLASSNAME)
+            && field.getName().toLowerCase().contains("head")
+            || field.getName().toLowerCase().contains("first");
+
+    private static final Predicate<Field> SIZE_FIELD_PREDICATE = field ->
+            field.getName().toLowerCase().contains("size");
+
+    private static final Predicate<Field> NODE_ELEMENT_FIELD_PREDICATE = field ->
+            field.getName().toLowerCase().contains("element")
             || field.getName().toLowerCase().contains("value")
             || field.getName().toLowerCase().contains("item");
-    private static final Predicate<Field> NODE_NEXT_FIELD = field -> field.getType().getSimpleName().equals(PROPER_CLASSNAME)
+
+    private static final Predicate<Field> NODE_NEXT_FIELD_PREDICATE = field ->
+            field.getType().getSimpleName().equals(PROPER_CLASSNAME)
             && field.getName().toLowerCase().contains("next");
 
     private Stack<Integer> intStack = new LinkedStack<>();
@@ -77,7 +92,7 @@ void checkProperElementField() {
         var fields = getInnerClass().getDeclaredFields();
 
         var elementField = Arrays.stream(fields)
-                .filter(NODE_ELEMENT_FIELD)
+                .filter(NODE_ELEMENT_FIELD_PREDICATE)
                 .findAny()
                 .orElseThrow();
         var nodeTypeParameter = getInnerClass().getTypeParameters()[0];
@@ -93,7 +108,7 @@ void checkProperNextField() {
         Field[] fields = getInnerClass().getDeclaredFields();
 
         boolean hasNext = Arrays.stream(fields)
-                .anyMatch(NODE_NEXT_FIELD);
+                .anyMatch(NODE_NEXT_FIELD_PREDICATE);
 
         assertThat(hasNext).isTrue();
     }
@@ -294,7 +309,7 @@ private Field getHeadField() {
 
     private Field getNodeElementField(Object node) {
         Field fieldElement = Arrays.stream(node.getClass().getDeclaredFields())
-                .filter(NODE_ELEMENT_FIELD)
+                .filter(NODE_ELEMENT_FIELD_PREDICATE)
                 .findAny()
                 .orElseThrow();
         fieldElement.setAccessible(true);
@@ -303,7 +318,7 @@ private Field getNodeElementField(Object node) {
 
     private Field getNodeNextField(Object node) {
         Field field = Arrays.stream(node.getClass().getDeclaredFields())
-                .filter(NODE_NEXT_FIELD)
+                .filter(NODE_NEXT_FIELD_PREDICATE)
                 .findAny()
                 .orElseThrow();
         field.setAccessible(true);