diff --git a/project-structure/BookDiagram.png b/project-structure/Book-Diagram.png similarity index 100% rename from project-structure/BookDiagram.png rename to project-structure/Book-Diagram.png diff --git a/project-structure/Borrowing-Diagram.png b/project-structure/Borrowing-Diagram.png new file mode 100644 index 0000000..97c1a26 Binary files /dev/null and b/project-structure/Borrowing-Diagram.png differ diff --git a/project-structure/Email-Send-Diagram.png b/project-structure/Email-Send-Diagram.png new file mode 100644 index 0000000..62b3c20 Binary files /dev/null and b/project-structure/Email-Send-Diagram.png differ diff --git a/project-structure/Exception-Diagram.png b/project-structure/Exception-Diagram.png new file mode 100644 index 0000000..b1b9bba Binary files /dev/null and b/project-structure/Exception-Diagram.png differ diff --git a/project-structure/Fine-Diagram.png b/project-structure/Fine-Diagram.png new file mode 100644 index 0000000..1942b2c Binary files /dev/null and b/project-structure/Fine-Diagram.png differ diff --git a/project-structure/Member-Diagram.png b/project-structure/Member-Diagram.png new file mode 100644 index 0000000..a9619bd Binary files /dev/null and b/project-structure/Member-Diagram.png differ diff --git a/project-structure/Notification-Diagram.png b/project-structure/Notification-Diagram.png new file mode 100644 index 0000000..c1ec815 Binary files /dev/null and b/project-structure/Notification-Diagram.png differ