Two variants of a picture database initialization routine

I wonder which of the two snippets is better? In the second one, I extracted two short subroutines.

• On the one hand, extraction clearly separate the two tasks
• On the other hand, it induces 6 more lines for function prototype

The code is about a simple images database called pictdb_file. The first function contributes to the creation of a new database.

/** this is a helper method for [...] blahblah */
static error_enum
db_create_delegate(const char* db_filename, pictdb_file* new_db_file)
{
    strncpy(new_db_file->header.db_name, CAT_TXT,  MAX_DB_NAME);
    new_db_file->header.db_name[MAX_DB_NAME] = '\0';

    new_db_file->header.num_files = 0;
    new_db_file->header.db_version = 0;

    size_t n1;
    n1 = fwrite(&new_db_file->header, sizeof(pictdb_header), 1, new_db_file->fpdb);
    if (n1 != 1) {
        return ERR_IO;
    }

    size_t n2;
    n2 = fwrite(new_db_file->metadata, sizeof(pict_metadata), new_db_file->header.max_files, new_db_file->fpdb);
    if (n2 != new_db_file->header.max_files) {
        return ERR_IO;
    }
    printf("%lu item(s) written\n", n1 + n2);
    return 0;
}

Compared to:

/** helper method [...] blahblah */
static error_enum
db_create_helper(const char* db_filename, pictdb_file* db_file)
{
    finish_initialization(db_file);
    return write_to_file(db_file);
}
static void
finish_initialization(pictdb_file* new_db_file)
{
    strncpy(new_db_file->header.db_name, CAT_TXT,  MAX_DB_NAME);
    new_db_file->header.db_name[MAX_DB_NAME] = '\0';

    new_db_file->header.num_files = 0;
    new_db_file->header.db_version = 0;
}
static error_enum
write_to_file(pictdb_file* db_file)
{
    size_t n1;
    n1 = fwrite(&db_file->header, sizeof(pictdb_header), 1, db_file->fpdb);
    if (n1 != 1) {
        return ERR_IO;
    }
    size_t n2;
    n2 = fwrite(db_file->metadata, sizeof(pict_metadata), db_file->header.max_files, db_file->fpdb);
    if (n2 != db_file->header.max_files) {
        return ERR_IO;
    }
    printf("%lu item(s) written\n", n1 + n2);
    return 0;
}