new persistence work

spring-exceptions/src/main/java/org/baeldung/ex/mappingexception/cause4/persistence/model/Foo.java

@@ -0,0 +1,31 @@
+package org.baeldung.ex.mappingexception.cause4.persistence.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Foo implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    public Foo() {
+        super();
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+}