Fikset en del av det som ble rapportert av PMD og SpotBugs

...src/main/java/fxutil/doc/AbstractDocumentStorageImpl.java

...eexample/src/main/java/fxutil/doc/FileMenuController.java

...e/src/main/java/fxutil/doc/SimpleJsonFileStorageImpl.java

simpleexample/src/main/java/simpleex/core/LatLong.java

simpleexample/src/main/java/simpleex/core/LatLongs.java

...mple/src/main/java/simpleex/json/LatLongDeserializer.java

...xample/src/main/java/simpleex/json/LatLongSerializer.java

...le/src/main/java/simpleex/ui/DraggableNodeController.java

simpleexample/src/main/java/simpleex/ui/FxAppController.java

simpleexample/src/main/java/simpleex/ui/MapMarker.java

simpleexample/src/test/java/simpleex/core/LatLongTest.java

simpleexample/src/test/java/simpleex/core/LatLongsTest.java

...example/src/test/java/simpleex/json/AbstractJsonTest.java

...eexample/src/test/java/simpleex/json/LatLongJsonTest.java

simpleexample/src/test/java/simpleex/ui/FxAppTest.java