When should I use the finally-block in Java's try-catch-finally

When should I use code snippet A instead of snippet B (i.e. what are the benefits of using snippet A)?:

Snippet A:

try {
    // codeblock A
}
catch (Exception ex) {
    // codeblock B
}
finally {
    //codeblock C
}

Snippet B:

try {
    // codeblock A
}
catch (Exception ex) {
    // codeblock B
}

//codeblock C