Init Check In with modules of Swagger, Entity, Database and Configuration

entity/pom.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>sydney.cheng</groupId>
+        <artifactId>ec-microservice-commons</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>ec-microservice-commons-entity</artifactId>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+    </dependencies>
+</project>

entity/src/main/java/sydney/cheng/entity/AbstractUser.java

@@ -0,0 +1,31 @@
+package sydney.cheng.entity;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.UuidGenerator;
+
+import java.io.Serializable;
+
+@MappedSuperclass
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public abstract class AbstractUser implements Serializable {
+    @Id
+    @UuidGenerator(style = UuidGenerator.Style.TIME)
+    @Column(name = "id")
+    private String id;
+
+    @Column(name = "username", nullable = false)
+    private String username;
+
+    @Column(name = "email", nullable = false, unique = true)
+    private String email;
+
+    @Column(name = "password", nullable = false)
+    private String password;
+}