@Override
				public void run() {
					for (PackedDatabase pdbInstance : pdbInstances) {
						try {
							if (pdbInstance.dbHandle != null) {
								pdbInstance.dbHandle.close();
							}
							pdbInstance.dispose();
						}
						catch (Throwable t) {
							// Ignore errors
						}
					}
				}
Add new PackedDatabase instance and ensure that all non-disposed
PackedDatabase instances are properly disposed when the VM shuts-down.
@param pdb new instance
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/db/PackedDatabase.java