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src/main/java/cc/javastudio/raw/FileHandler.java

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+package cc.javastudio.raw;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+
+public class FileHandler implements Closeable {
+    private final int INT_LENGTH = 4;
+    private final byte BYTE_LENGTH = 1;
+    private RandomAccessFile dbFile;
+
+    public FileHandler(String dbFileName) throws FileNotFoundException {
+        dbFile = new RandomAccessFile(dbFileName,"rw");
+    }
+
+    public void add(String name, int age, String address, String licencePlate, String desciption) throws IOException {
+        dbFile.seek(dbFile.length());
+        int recordLength = INT_LENGTH + name.length() +
+                           INT_LENGTH +
+                           INT_LENGTH + address.length() +
+                           INT_LENGTH + licencePlate.length() +
+                           INT_LENGTH + desciption.length();
+
+        dbFile.writeBoolean(false);
+        dbFile.writeInt(recordLength);
+        dbFile.writeInt(name.length());
+        dbFile.write(name.getBytes());
+        dbFile.writeInt(age);
+        dbFile.writeInt(address.length());
+        dbFile.write(address.getBytes());
+        dbFile.writeInt(licencePlate.length());
+        dbFile.write(licencePlate.getBytes());
+        dbFile.writeInt(desciption.length());
+        dbFile.write(desciption.getBytes());
+    }
+
+    public Person readRow(int rowNUmber) throws IOException {
+        Person person = new Person();
+        byte [] rawData = readRawRecord(0);
+        DataInputStream stream = new DataInputStream(new ByteArrayInputStream(rawData));
+        byte[] b = new byte[stream.readInt()];
+        stream.read(b);
+        person.name = new String(b);
+
+        return person;
+    }
+
+    private byte[] readRawRecord(int rowNumber) throws IOException {
+        int pos = 0;
+        byte [] data;
+        dbFile.seek(pos);
+
+        if(dbFile.readBoolean()){
+            data = new byte[0];
+        }
+        else {
+            pos+= BYTE_LENGTH;
+            dbFile.seek(pos);
+            int recordLength = dbFile.readInt();
+            pos += INT_LENGTH;
+            data = new byte[recordLength];
+            dbFile.read(data);
+        }
+        return data;
+    }
+
+    public void close() throws IOException {
+        dbFile.close();
+    }
+}

src/main/java/cc/javastudio/raw/Person.java

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+package cc.javastudio.raw;
+
+public class Person {
+    public String name;
+    public int age;
+    public String address;
+    public String licencePlate;
+    public String Description;
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                ", address='" + address + '\'' +
+                ", licencePlate='" + licencePlate + '\'' +
+                ", Description='" + Description + '\'' +
+                '}';
+    }
+}

src/main/java/cc/javastudio/testapp/TestApp.java

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+package cc.javastudio.testapp;
+
+import cc.javastudio.raw.FileHandler;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+public class TestApp {
+    public static void main(String[] args)  {
+        try(FileHandler fh = new FileHandler("DBServer.db")) {
+            fh.add("John Doe", 44,  "New-York", "www-404", "Blue VW Beetle");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}