Visualforce Controller Bad Example with try/catch

gistfile1.txt

// New account
Account a = new Account(Name = 'New Account');
try{

    insert a;
    system.debug('Success');

} catch(dmlexception e){

  // If DML failed, ends up here
  system.debug('Error inserting account: ' + e);
  ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'Could not insert account record. Error: ' + e));
}

// ************ Assume that the account was a success above, continue below ***********


// New Case linked to account
Case c = new Case(subject = 'I need help', accountId = a.id);
try{

    insert c;
    system.debug('Success');

} catch(dmlexception e){

  // ************ Assume the CASE insert FAILED ***********
  // If DML failed, ends up here
  system.debug('Error inserting case: ' + e);
  ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'Could not insert Case record. Error: ' + e));

}

// If we get this far in code, something may have failed and been caught above, or everything worked.
system.debug('Potential Success');