EOImpl should be declared abstract

In order to avoid the error just Copy past the below lines into your EOImpl

public void setLastUpdateLogin( oracle.jbo.domain.Number n ) {}
public void setLastUpdatedBy( oracle.jbo.domain.Number n ) {}
public void setLastUpdateDate( oracle.jbo.domain.Date n ) {}
public void setCreationDate( oracle.jbo.domain.Date n ) {}
public void setCreatedBy( oracle.jbo.domain.Number n ) {}