code review suggestions from @katzyn

h2/src/main/org/h2/mvstore/FileStore.java

@@ -186,13 +186,13 @@ public class FileStore {
      * Close this store.
      */
     public void close() {
-        if(file != null && file.isOpen()) {
         try {
-                if (fileLock != null && fileLock.isValid()) {
+            if(file != null && file.isOpen()) {
+                if (fileLock != null) {
                     fileLock.release();
                 }
                 file.close();
-                freeSpace.clear();
+            }
         } catch (Exception e) {
             throw DataUtils.newIllegalStateException(
                     DataUtils.ERROR_WRITING_FAILED,
@@ -202,7 +202,6 @@ public class FileStore {
             file = null;
         }
     }
-    }
 
     /**
      * Flush all changes.