public void writeGhidraExtensionsDir() throws IOException {
			ZipEntry entry = new ZipEntry(ROOT_GHIDRA + "Extensions/");

			try {
				jarOut.putNextEntry(entry);
			}
			catch (ZipException e) {
				System.out.println(e.getMessage());
				return;
			}
			finally {
				jarOut.closeEntry();
			}
		}
Puts a directory in the jar for Ghidra Extensions. This may be empty (if
no extensions are installed) but should exist nonetheless.

@throws IOException if there's an error writing to the jar
Ghidra/Features/Base/src/main/java/ghidra/util/GhidraJarBuilder.java