[Demonstration 1]

[Buggy Method]
public static ArrayList<String> getAvailableAccountName(@NonNull ContentResolver contentResolver, @NonNull Account account) {
    Objects.requireNonNull(contentResolver, "Parameter contentResolver of type ContentResolver is mandatory");
    Objects.requireNonNull(account, "Parameter account of type Account is mandatory");
    ArrayList<String> names = new ArrayList<>();
    Uri uri = IncomeExpenseContract.AccountEntry.CONTENT_URI;
    Cursor cursor = null;
    try {
        String selection = String.format("%1$s !=?", IncomeExpenseContract.AccountEntry.COLUMN_ID);
        // Si account est new le id va etre null, donc remplacer par -1
        String[] selectionArgument = new String[] { account.isNew() ? "-1" : account.getId().toString() };
        cursor = contentResolver.query(uri, new String[] { IncomeExpenseContract.AccountEntry.COLUMN_NAME }, selection, selectionArgument, IncomeExpenseContract.AccountEntry.COLUMN_NAME);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
            String name = cursor.getString(cursor.getColumnIndex(IncomeExpenseContract.AccountEntry.COLUMN_NAME));
            names.add(name.toUpperCase());
        }
    } finally {
        if (null != cursor) {
            cursor.close();
        }
    }
    return names;
}

[Buggy Hunk]
if (null != cursor) {

[Patch]
if (null != cursor && !cursor.isClosed()) {

[Demonstration 2]

[Buggy Method]
@Override
protected void onDestroy() {
    super.onDestroy();
    if (mAdapter != null) {
        ((FirebaseRecyclerAdapter) mAdapter).cleanup();
    }
    mFirebaseRef.removeAuthStateListener(mAuthListener);
}

[Buggy Hunk]
if (mAdapter != null) {

[Patch]
if (mAdapter != null && mAdapter instanceof FirebaseRecyclerAdapter) {