diff --git a/app/src/main/java/ru/project/datasource/DataSource.java b/app/src/main/java/ru/project/datasource/DataSource.java
deleted file mode 100644
index 08530a2..0000000
--- a/app/src/main/java/ru/project/datasource/DataSource.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package ru.project.datasource;
-
-import ru.project.student.Student;
-import ru.project.collection.MyList;
-
-
-public interface DataSource {
-    MyList<Student> create();
-}
diff --git a/app/src/main/java/ru/project/datasource/FileDataSource.java b/app/src/main/java/ru/project/datasource/FileDataSource.java
deleted file mode 100644
index d15f63e..0000000
--- a/app/src/main/java/ru/project/datasource/FileDataSource.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package ru.project.datasource;
-
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.stream.Collector;
-import java.util.NoSuchElementException;
-import ru.project.student.Student;
-import ru.project.collection.MyList;
-import ru.project.collection.MyLinkedList;
-
-public class FileDataSource implements DataSource{
-    private final String fileName;
-
-    public FileDataSource(String fileName) {
-        this.fileName = fileName;
-    }
-
-    @Override
-    public MyList<Student> create() {
-        MyList<Student> resultList = new MyLinkedList<>();
-        try {
-            StudentCsvReader reader = new StudentCsvReader(fileName);
-            while (reader.hasNext()) {
-                resultList.add(reader.next());
-            }
-            return resultList;
-        }
-        catch (IllegalArgumentException e){
-            System.out.println(e.getMessage());
-            return null;
-        }
-        catch (NoSuchElementException e){
-            System.out.println(e.getMessage() + "No such element");
-            return null;
-        }
-    }
-}
diff --git a/app/src/main/java/ru/project/datasource/FileWriter.java b/app/src/main/java/ru/project/datasource/FileWriter.java
deleted file mode 100644
index 5d78d89..0000000
--- a/app/src/main/java/ru/project/datasource/FileWriter.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package ru.project.datasource;
-
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.StandardOpenOption;
-import ru.project.student.Student;
-import ru.project.collection.MyList;
-import ru.project.collection.MyLinkedList;
-//import ru.project.collection.Iterator;
-
-public class FileWriter {
-    private Path path;
-
-    public FileWriter(String absolutePath) {
-        this.path = Path.of(absolutePath);
-    }
-
-    public void write(MyList<Student> iist){
-        //int sizeOfCollection = list.size();
-        try (BufferedWriter writer = Files.newBufferedWriter(
-                path,
-                StandardOpenOption.CREATE,
-                StandardOpenOption.APPEND
-        )) {
-            /*Iterator iterator = list.getIterator();
-            while (iterator.hasNext()){
-                writer.write(iterator.next().toFileString());
-                writer.newLine();
-            }*/
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
diff --git a/app/src/main/java/ru/project/datasource/RandomDataSource.java b/app/src/main/java/ru/project/datasource/RandomDataSource.java
deleted file mode 100644
index 9239aad..0000000
--- a/app/src/main/java/ru/project/datasource/RandomDataSource.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package ru.project.datasource;
-
-import ru.project.student.Student;
-import ru.project.student.StudentBuilder;
-import ru.project.collection.MyList;
-import ru.project.collection.MyLinkedList;
-import java.util.Random;
-
-public class RandomDataSource implements  DataSource{
-    private final int size;
-    //private final String CHARS = "АБВГДЕЖХИКЛМНОПРСТУФХЦЧЩЭЮЯ";
-    private int upperBounRecordBookNumber;
-
-    public RandomDataSource(int size) {
-        this.size = size;
-    }
-
-    public void setUpperBounRecordBookNumber(int upperBounRecordBookNumber) {
-        this.upperBounRecordBookNumber = upperBounRecordBookNumber;
-    }
-
-    private String getRandomGroupNumber(Random random){
-        char prefix = (char)(random.nextInt(26) + (int)'A');
-        String result = prefix + String.format("%02d", random.nextInt(100));
-        return result;
-    }
-    /*private String getRandomRecordBookNumber(Random random){
-        StringBuilder buildRes = new StringBuilder(CHARS.charAt(random.nextInt(CHARS.length())));
-        buildRes.append(String.format("%08d", random.nextInt(99999999)));
-        return buildRes.toString();
-    }*/
-
-    @Override
-    public MyList<Student> create() {
-        if (upperBounRecordBookNumber < 0)
-            throw new IllegalArgumentException("The upper bound is negative!!!");
-        Random random = new Random();
-        MyList<Student> result = new MyLinkedList<>();
-        for (short i = 0; i<size; i++){
-            result.add(new StudentBuilder()
-                    .setGroupNumber(getRandomGroupNumber(random))
-                    .setAverageGrade(Math.random() * 5.0)
-                    .setRecordBookNumber(random.nextInt(upperBounRecordBookNumber + 1))
-                    .build());
-        }
-        return result;
-    }
-}
diff --git a/app/src/main/java/ru/project/datasource/StudentBuffer.java b/app/src/main/java/ru/project/datasource/StudentBuffer.java
deleted file mode 100644
index 23faa96..0000000
--- a/app/src/main/java/ru/project/datasource/StudentBuffer.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package ru.project.datasource;
-
-public class StudentBuffer {
-    private String groupNumber;
-    private double averageGrade;
-    private int recordBookNumber;
-
-    public StudentBuffer(String groupNumber, double averageGrade, Integer recordBookNumber) {
-        this.groupNumber = groupNumber;
-        this.averageGrade = averageGrade;
-        this.recordBookNumber = recordBookNumber;
-    }
-
-    public String getGroupNumber() {
-        return groupNumber;
-    }
-
-    public void setGroupNumber(String groupNumber) {
-        this.groupNumber = groupNumber;
-    }
-
-    public double getAverageGrade() {
-        return averageGrade;
-    }
-
-    public void setAverageGrade(double averageGrade) {
-        this.averageGrade = averageGrade;
-    }
-
-    public int getRecordBookNumber() {
-        return recordBookNumber;
-    }
-
-    public void setRecordBookNumber(int recordBookNumber) {
-        this.recordBookNumber = recordBookNumber;
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/ru/project/datasource/StudentCsvWriter.java b/app/src/main/java/ru/project/datasource/StudentCsvWriter.java
deleted file mode 100644
index c086ec0..0000000
--- a/app/src/main/java/ru/project/datasource/StudentCsvWriter.java
+++ /dev/null
@@ -1,73 +0,0 @@
-package ru.project.datasource;
-
-import org.apache.commons.csv.CSVFormat;
-import org.apache.commons.csv.CSVPrinter;
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.nio.file.StandardOpenOption;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-
-import ru.project.student.Student;
-import ru.project.collection.MyList;
-import ru.project.collection.MyLinkedList;
-
-
-public class StudentCsvWriter{
-    private static final String[] HEADER = {
-            "groupNumber", "averageGrade", "recordBookNumber"
-    };
-    private static final DateTimeFormatter FILE_NAME_FORMAT =
-            DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm");
-
-    private final Path requestedPath;
-    private Path actualPath;
-
-    public StudentCsvWriter(String absoluteFilePath) {
-        Path path = Paths.get(absoluteFilePath);
-        if (!path.isAbsolute()) {
-            throw new IllegalArgumentException("File path must be absolute");
-        }
-        this.requestedPath = path;
-    }
-
-    public void write(Student student) throws IOException {
-        Path target = resolveTargetPath();
-        boolean fileExists = Files.exists(target);
-
-        StandardOpenOption[] options = fileExists
-                ? new StandardOpenOption[]{StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.APPEND}
-                : new StandardOpenOption[]{StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE};
-
-        try (BufferedWriter writer = Files.newBufferedWriter(target, StandardCharsets.UTF_8, options);
-             CSVPrinter printer = new CSVPrinter(writer, CSVFormat.DEFAULT)) {
-            if (!fileExists) {
-                printer.printRecord((Object[]) HEADER);
-            }
-            printer.printRecord(
-                    student.getGroupNumber(),
-                    Double.toString(student.getAverageGrade()),
-                    student.getRecordBookNumber()
-            );
-        }
-    }
-
-    private Path resolveTargetPath() {
-        if (actualPath != null) {
-            return actualPath;
-        }
-        if (Files.exists(requestedPath)) {
-            actualPath = requestedPath;
-            return actualPath;
-        }
-
-        Path parent = requestedPath.getParent();
-        String fileName = "students-" + LocalDateTime.now().format(FILE_NAME_FORMAT) + ".csv";
-        actualPath = parent == null ? Paths.get(fileName).toAbsolutePath() : parent.resolve(fileName);
-        return actualPath;
-    }
-}
\ No newline at end of file