Checked Provider guice

checked_provider_guice.java

// CheckedProvider is an interface, which is a part of extension guice-throwingproviders.
public interface CheckedProvider<T> {
  T get() throws Exception;
}

// Injection 
@Inject
private ExcelCheckedProvider<FlightSupplier> excelCheckedProvider;

// Binding
ThrowingProviderBinder.create(binder()).
  bind(ExcelCheckedProvider.class, FlightSupplier.class).
    to(ExcelCheckedSupplierProvider.class);

// Usage
try
{
  excelCheckedProvider.get().getResults();
} catch (NoExcelAvailableException e) {
  e.printStackTrace();
}