Update CHANGES.md

CHANGES.md

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 Change Log
 ==========
 
-### 3.0.0-draft.2019.04.05.1 (2019-04-05)
+### 3.0.0-draft.2019.04.09.1 (2019-04-09)
 
 ##### Changes
 
+* The classes `Void` and `VoidSurface` were removed. In addition, the class `AbstractSpaceBoundary` was renamed to `AbstractThematicSurface` which allowed for removing the subclass `AbstractThematicSurface`. [#22](https://github.com/opengeospatial/CityGML-3.0CM/issues/22)
+* `DoorSuface` and `WindowSurface` were made subclasses of the new superclass `AbstractFillingSurface` which in turn inherits from `AbstractSurfaceBoundary`. In addition, associations from `AbstractConstructionSurface` to `AbstractFillingSurface` and `ClosureSurface` were defined. Furthermore, a class `AbstractFillingElement` was added as superclass of `Door` and `Window` as well as an association from `AbstractConstructiveElement` to `AbstractFillingElement`. [#54](https://github.com/opengeospatial/CityGML-3.0CM/issues/54)
 * The class `BridgeConstructionElement` was renamed to `BridgeConstructiveElement`. An attribute `isStructuralElement` was added to the class `AbstractConstructiveElement`. [#21](https://github.com/opengeospatial/CityGML-3.0CM/issues/21)
 * The class `Room` was renamed to `BuildingRoom`. [#33](https://github.com/opengeospatial/CityGML-3.0CM/issues/33)
 * The attribute `heightAboveGround` was renamed to `height`. [#35](https://github.com/opengeospatial/CityGML-3.0CM/issues/35)
 * The attribute `heightReference` was renamed to `highReference`. [#56](https://github.com/opengeospatial/CityGML-3.0CM/issues/56)
 * All role names (with few exceptions) use now the name of the target class as role name, starting with a lower case letter. [#55](https://github.com/opengeospatial/CityGML-3.0CM/issues/55)
-* The attributes `volume` and `area` were added to the class `AbstractSpace`, the attribute `area` was added to the class `AbstractSpaceBoundary`. In addition, the data types `QualifiedVolume` and `QualifiedArea` as well as the code lists `QualifiedVolumeValue` and `QualifiedAreaValue` were defined. [#51](https://github.com/opengeospatial/CityGML-3.0CM/issues/51)
-* The classes `Void` and `VoidSurface` were removed. In addition, the class `AbstractSpaceBoundary` was renamed to `AbstractThematicSurface` which allowed for removing the subclass `AbstractThematicSurface`. [#22](https://github.com/opengeospatial/CityGML-3.0CM/issues/22)
+* The attributes `volume` and `area` were added to the class `AbstractSpace`, the attribute `area` was added to the class `AbstractThematicSurface`. In addition, the data types `QualifiedVolume` and `QualifiedArea` as well as the code lists `QualifiedVolumeValue` and `QualifiedAreaValue` were defined. [#51](https://github.com/opengeospatial/CityGML-3.0CM/issues/51)
 * The attribute `dateOfRenovation` was removed. Instead, an attribute `constructionEvent` was added together with the data type `ConstructionEvent` and the code list `EventValue`. [#53](https://github.com/opengeospatial/CityGML-3.0CM/issues/53)
-* `DoorSuface` and `WindowSurface` were made subclasses of the new superclass `AbstractFillingSurface` which in turn inherits from `AbstractSurfaceBoundary`. In addition, associations from `AbstractConstructionSurface` to `AbstractFillingSurface` and `ClosureSurface` were defined. Furthermore, a class `AbstractFillingElement` was added as superclass of `Door` and `Window` as well as an association from `AbstractConstructiveElement` to `AbstractFillingElement`. [#54](https://github.com/opengeospatial/CityGML-3.0CM/issues/54)
+
 
 ### 3.0.0-draft.2018.12.17.1 (2018-12-17)