Added new tests that needs to be implemented.

test/hhn/temp/project/DatabaseBadCasesTest.java

@@ -6,6 +6,7 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
+import java.io.IOException;
 import java.sql.SQLException;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -27,7 +28,21 @@ public class DatabaseBadCasesTest {
   }
 
   @BeforeEach
-  public void setup() {
+  public void setup() throws SQLException, IOException {
     databaseManager = new SimpleDatabaseManager<>();
+    databaseManager.connect();
+    databaseManager.clearDatabase();
+  }
+
+  @Test
+  @DisplayName("Gets an object that may not be existent")
+  public void assertObjectShouldNotBeExistent() throws SQLException {
+    assertNull(databaseManager.getObject(999));
+  }
+
+  @Test
+  @DisplayName("Updates an object that does not exist")
+  public void assertUpdateNonExistentObject() throws SQLException {
+    assertNull(databaseManager.updateObject(123, new Task(1, 2, "", "")));
   }
 }