public int getStoredVersion() throws IOException {
		String dbVersionDtr = dataMap.get(PROGRAM_DB_VERSION);
		if (dbVersionDtr != null) {
			try {
				return Integer.parseInt(dbVersionDtr);
			}
			catch (NumberFormatException e) {
				// return 1 for invalid value
			}
		}
		return 1;
	}
Initialize the following fields from the database and check the database version for an existing database:
<ul>
<li>name</li>
<li>languageName</li>
<li>languageVersion</li>
<li>LanguageMinorVersion</li>
</ul>
@param openMode program open mode
@return version exception if the current version is out of date and can be upgraded
@throws IOException if there is an exception at the database level
@throws VersionException if the data is newer than this version of Ghidra and can not be
upgraded or opened.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/ProgramDB.java