Modern database systems are very often in the position to store and efficiently process their entire data in main memory. Aside from increased main memory capacities, a further driver for in-memory database systems has been the shift to a column-oriented storage format in combination with lightweight data compression techniques. In recent years, a lot of lightweight data compression algorithms have been developed to efficiently support different data characteristics. Therefore, database systems should include a large number of these algorithms. To enable this, we introduce our novel modularization concept including our model kit implementation for lightweight data compression algorithms.