Removed several compiler warnings.

...rc/main/java/de/evoal/core/api/board/BlackboardEntry.java

...e.main/src/main/java/de/evoal/core/api/cdi/MainClass.java

...core/api/constraints/calculation/CalculationStrategy.java

...java/de/evoal/core/api/utils/InitializationException.java

.../de/evoal/core/main/comparator/WeightedSumComparator.java

...al/core/main/comparator/WeightedSumOptimisationValue.java

.../core/main/constraints/constraint/ConstraintProducer.java

...straint/strategies/constraint/RandomGenotypeStrategy.java

.../strategies/fitness/internal/MalusForFitnessFunction.java

...main/constraints/constraint/utils/ConfigurationUtils.java

...voal/core/main/producer/OptimisationFunctionProducer.java

...de/evoal/core/main/producer/PropertiesRangesProducer.java

...va/de/evoal/core/main/producer/SpecificationProducer.java

...a/de/evoal/core/main/properties/JsonPropertiesReader.java

...a/de/evoal/core/main/properties/JsonPropertiesWriter.java

...java/de/evoal/core/main/statistics/StatisticsFactory.java

...core/main/statistics/fitness/BestCandidateStatistics.java

...ore/main/statistics/individuals/IndividualStatistics.java