audit event failed tests

src/main/java/at/ac/uibk/gitsearch/domain/PersistentAuditEvent.java

@@ -4,16 +4,7 @@ import java.io.Serializable;
 import java.time.Instant;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import javax.persistence.CollectionTable;
-import javax.persistence.Column;
-import javax.persistence.ElementCollection;
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.GenerationType;
-import javax.persistence.Id;
-import javax.persistence.JoinColumn;
-import javax.persistence.MapKeyColumn;
-import javax.persistence.Table;
+import javax.persistence.*;
 import javax.validation.constraints.NotNull;
 
 /**
@@ -84,7 +75,7 @@ public class PersistentAuditEvent implements Serializable {
     return data;
   }
 
-  public void setData(Map<String, String> data) {
+  private void setData(Map<String, String> data) {
     this.data = data;
   }