fix publisher

src/main/java/com/covas/Entity/PublisherEntity.java

@@ -2,6 +2,7 @@ package com.covas.Entity;
 
 import java.io.Serializable;
 import java.time.LocalDateTime;
+import java.util.Collection;
 import java.util.List;
 import java.util.UUID;
 
@@ -16,6 +17,7 @@ import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
 import javax.persistence.NamedQueries;
 import javax.persistence.NamedQuery;
+import javax.persistence.OneToMany;
 import javax.persistence.CascadeType;
 
 import org.hibernate.annotations.ColumnDefault;