task4 is done

src/main/java/task_4/AvengersBase.java

@@ -0,0 +1,37 @@
+package task_4;
+
+import javax.naming.AuthenticationException;
+
+public class AvengersBase {
+    private String secretDocument = "Secret";
+
+    public static void main(String[] args) {
+        AvengersBase avengersBase = new AvengersBase();
+        Hero Loki = new Hero("Loki");
+        try {
+            avengersBase.enterBase(Loki);
+        } catch (SecurityBreachException e) {
+            e.printStackTrace();
+        }
+        try {
+            avengersBase.getSecretDocuments(Loki, "Secret");
+        } catch (UnauthorizedAccessAttemptException e) {
+            e.printStackTrace();
+        }
+    }
+
+    // Герой пытается вотий в базу
+    public void enterBase(Hero hero) {
+        if (hero.getName().equals("Loki")) {
+            throw new SecurityBreachException("Loki is attacking");
+        }
+    }
+
+    // Герой пытается получить доступ к документу
+    public String getSecretDocuments(Hero hero, String documentName) {
+        if (documentName.equals(secretDocument)) {
+            throw new UnauthorizedAccessAttemptException(hero.getName() + " try to get secret document " + documentName);
+        }
+        return documentName;
+    }
+}

src/main/java/task_4/Hero.java

@@ -0,0 +1,13 @@
+package task_4;
+
+public class Hero {
+    private final String name;
+
+    public Hero(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

src/main/java/task_4/SecurityBreachException.java

@@ -0,0 +1,7 @@
+package task_4;
+
+public class SecurityBreachException extends RuntimeException{
+    public SecurityBreachException(String message) {
+        super(message);
+    }
+}

src/main/java/task_4/UnauthorizedAccessAttemptException.java

@@ -0,0 +1,7 @@
+package task_4;
+
+public class UnauthorizedAccessAttemptException extends RuntimeException{
+    public UnauthorizedAccessAttemptException(String message) {
+        super(message);
+    }
+}