Try without catch or throws?

Android Programming (3rd Edition) 14. SQLite Databases
1

The implementation of getCrimes includes a try/finally block:

    public List<Crime> getCrimes() {
    List<Crime> crimes = new ArrayList<Crime>();
    CrimeCursorWrapper cursor = queryCrimes(null, null);
    try {
        cursor.moveToFirst();
        while (!cursor.isAfterLast()) {
            crimes.add(cursor.getCrime());
            cursor.moveToNext();
        }
    } finally {
        cursor.close();
    }
    return crimes;
}

What possibly throws an exception here? Why does the author choose to use a try/finally block here, without a catch or a throws attribute on the method signature? This is also done in the getCrime method.

2

getString(), getLong() and getInt() methods used in .getCrime() can throws an exception when the column value is null or the column type is not valid type.

3

The methods wrapped in try can throw an unchecked exception, that does not need caught or marked with a throws.

4

The finally block is always executed so it will handle unchecked exceptions as well