In accordance with the EU Directives 2009/14/EC (CELEX No. 32009L0014) [see EU Directive 2009/14/EC], states within the EU have set up deposit guarantee schemes which protect deposits of savers per bank, usually with 100% coverage for amounts up to EUR 100,000 (or the equivalent in the national currency). You can find an overview of the individual regulations in each product information sheet.
National deposit guarantee schemes typically build up a reserve fund by annual levies of all banks within the country. The state usually issues a guarantee for its deposit guarantee scheme, so that sufficient capital is available to cover all the claims of depositors in the event of a major insolvency of banks.