diff --git a/src/main/java/org/example/Course.java b/src/main/java/org/example/Course.java
index d990da4..10cb36b 100644
--- a/src/main/java/org/example/Course.java
+++ b/src/main/java/org/example/Course.java
@@ -147,12 +147,28 @@ public class Course {
         return courses;
     }
 
+    /**
+     * Adds a new course to the file with provided details.
+     *
+     * @param courseName   The name of the course.
+     * @param courseCode   The code of the course.
+     * @param courseCredit The credit value of the course.
+     * @param filename     The name of the file to write to.
+     */
     public static void addCourse(String courseName, String courseCode, int courseCredit, String filename) {
         // Write course data to the file
         Course course = new Course();
         course.writeToFile(courseName, courseCode, courseCredit, filename);
     }
 
+    /**
+     * Checks if a course with the given name or code already exists in the file.
+     *
+     * @param filename The name of the file to read from.
+     * @param name     The name of the course.
+     * @param code     The code of the course.
+     * @return True if a course with the same name or code exists, otherwise False.
+     */
     private static boolean courseExists(String filename, String name, String code) {
         List<Course> courses = readFromFile(filename);
         for (Course course : courses) {
@@ -163,6 +179,11 @@ public class Course {
         return false; // No course with the same name or code found
     }
 
+    /**
+     * Adds a new course to the file based on user input.
+     *
+     * @param filename The name of the file to write to.
+     */
     public static void addCourseFromUserInput(String filename) {
         Scanner scanner = new Scanner(System.in);
 
@@ -185,6 +206,11 @@ public class Course {
         System.out.println("Added Course successfully!");
     }
 
+    /**
+     * Deletes a course from the file based on user input.
+     *
+     * @param filename The name of the file to write to.
+     */
     public static void deleteCourse(String filename) {
         List<Course> courses = readFromFile(filename);
 
diff --git a/src/test/java/org/example/CourseTest.java b/src/test/java/org/example/CourseTest.java
index fa987a0..ec0f7c9 100644
--- a/src/test/java/org/example/CourseTest.java
+++ b/src/test/java/org/example/CourseTest.java
@@ -108,6 +108,10 @@ class CourseTest {
         deleteTempFile();
     }
 
+    /**
+     * Tests the addCourse method of the Course class.
+     * Verifies that a new course can be added to the file.
+     */
     @Test
     void addCourse() {
         // Create a new course
@@ -132,6 +136,10 @@ class CourseTest {
         deleteTempFile();
     }
 
+    /**
+     * Tests the deleteCourse method of the Course class.
+     * Verifies that a course can be deleted from the file.
+     */
     @Test
     public void testDeleteCourse() throws IOException {
         // Prepare test data