package org.silverpeas.core.calendar.event;
<BUG>import org.silverpeas.core.calendar.*;
import org.silverpeas.core.date.Period;
import org.silverpeas.core.persistence.datasource.model.identifier.UuidIdentifier;
import org.silverpeas.core.persistence.datasource.model.jpa.AbstractJpaEntity;
import javax.persistence.*;</BUG>
import javax.validation.constraints.NotNull;

package org.silverpeas.core.calendar.event;
import org.silverpeas.core.calendar.*;
import org.silverpeas.core.calendar.repository.CalendarEventRepository;
import org.silverpeas.core.date.Period;
import org.silverpeas.core.persistence.Transaction;
import org.silverpeas.core.persistence.datasource.model.identifier.UuidIdentifier;
import org.silverpeas.core.persistence.datasource.model.jpa.AbstractJpaEntity;
import org.silverpeas.core.persistence.datasource.repository.OperationContext;
import javax.persistence.*;
import javax.validation.constraints.NotNull;
