<s>[INST] We're going to create a simple database class. This class should be able to add, remove, and list items, and it should be able to persist data.

Here is an example of what the database might look like:

class Database:
    def __init__(self, filename):
        self.filename = filename
        self.load()

    def load(self):
        try:
            with open(self.filename, 'r') as f:
                self.data = f.read().splitlines()
        except FileNotFoundError:
            self.data = []

    def dump(self):
        with open(self.filename, 'w') as f:
            f.write('\n'.join(self.data))

    def add(self, item):
        self.data.append(item)
        self.dump()

    def remove(self, item):
        if item in self.data:
            self.data.remove(item)
            self.dump()

    def list(self):
        return self.data

# Here is an example of how we can use it:
db = Database('example.txt')
db.add('apple')
db.add('orange')
db.add('grape')
print(db.list())  # prints ['apple', 'orange', 'grape']
db.remove('orange')
print(db.list())  # prints ['apple', 'grape']

I would like to use the JSON format to store the list of items, so that we have more flexibility for future features.

Here is an example of a new `load` and `dump` methods:

def load(self):
    try:
        with open(self.filename, 'r') as f:
            self.data = json.load(f)
    except FileNotFoundError:
        self.data = []

def dump(self):
    with open(self.filename, 'w') as f:
        json.dump(self.data, f)

How can I handle exceptions and error checking for the new `load` and `dump` methods?[/INST]