diff --git a/src/main/java/org/example/Course.java b/src/main/java/org/example/Course.java
index 74a5f38..7715ca3 100644
--- a/src/main/java/org/example/Course.java
+++ b/src/main/java/org/example/Course.java
@@ -102,6 +102,11 @@ public class Course {
         System.out.println("Course Credits: " + courseCredit);
     }
 
+    /**
+     * Writes the information of the course to a file.
+     *
+     * @param filename The name of the file to write to.
+     */
     public void writeToFile(String filename) {
         try (PrintWriter writer = new PrintWriter(new FileWriter(filename))) {
             writer.println(courseName);
@@ -113,6 +118,12 @@ public class Course {
         }
     }
 
+    /**
+     * Reads course information from a file and returns a list of courses.
+     *
+     * @param filename The name of the file to read from.
+     * @return A list of Course objects read from the file.
+     */
     public static List<Course> readFromFile(String filename) {
         List<Course> courses = new ArrayList<>();
 
diff --git a/src/test/java/org/example/CourseTest.java b/src/test/java/org/example/CourseTest.java
index 0050875..b7c7620 100644
--- a/src/test/java/org/example/CourseTest.java
+++ b/src/test/java/org/example/CourseTest.java
@@ -7,10 +7,18 @@ import static org.junit.Assert.assertEquals;
 import java.io.*;
 import java.util.List;
 
-
+/**
+ * The CourseTest class contains unit tests for the Course class.
+ * It tests methods for printing course information, writing course data to a file,
+ * and reading course data from a file.
+ */
 class CourseTest {
     private static final String TEMP_FILE = "test_course_data.txt";
 
+    /**
+     * Tests the printCourseInfo method of the Course class.
+     * Verifies that the method correctly prints course information to the console.
+     */
     @Test
     void printCourseInfo() {
         // Create a new Course object
@@ -44,6 +52,10 @@ class CourseTest {
         assertEquals(expectedCourseCredits, outputLines[2].trim());
     }
 
+    /**
+     * Tests the writeToFile method of the Course class.
+     * Verifies that course data is correctly written to a file and can be read back.
+     */
     @Test
     void writeToFile() {
         // Create a new course
@@ -66,6 +78,10 @@ class CourseTest {
         deleteTempFile();
     }
 
+    /**
+     * Tests the readFromFile method of the Course class.
+     * Verifies that course data can be correctly read from a file.
+     */
     @Test
     void readFromFile() {
         // Create a temporary file with sample course data
@@ -91,6 +107,11 @@ class CourseTest {
         deleteTempFile();
     }
 
+    /**
+     * Creates a temporary file with the provided data.
+     *
+     * @param data The data to write to the file.
+     */
     private void createTempFile(String... data) {
         try (PrintWriter writer = new PrintWriter(new FileWriter(TEMP_FILE))) {
             for (String line : data) {
@@ -101,6 +122,9 @@ class CourseTest {
         }
     }
 
+    /**
+     * Deletes the temporary file used for testing.
+     */
     private void deleteTempFile() {
         File file = new File(TEMP_FILE);
         if (file.exists()) {