GeodeticAuthorityFactory changes for revisions 26173:26212

This change fixes a spelling error: "unknow" to "unknown". This correction is still present in Apache SIS. So we took this commit…

The second change ("occured" to "occurs") has been reverted to "occurred" (spelling fixed) for consistency with other javadoc.

Command line:

svn diff --extensions "--unified --ignore-space-change --ignore-all-space --ignore-eol-style" -r26173:26212 https://svn.osgeo.org/geotools/trunk/modules/library/referencing/src/main/java/org/geotools/referencing/factory/AbstractAuthorityFactory.java
Revision 26173Revision 26212
public abstract Citation getAuthority();

/**
 * Returns a description of the underlying backing store, or {@code null} if unknow.
 * This is for example the database software used for storing the data.
 * The default implementation returns always {@code null}.
 *
 * @throws FactoryException if a failure occured while fetching the engine description.
 */
public String getBackingStoreDescription() throws FactoryException {
    return null;
public abstract Citation getAuthority();

/**
 * Returns a description of the underlying backing store, or {@code null} if unknown.
 * This is for example the database software used for storing the data.
 * The default implementation returns always {@code null}.
 *
 * @throws FactoryException if a failure occurs while fetching the engine description.
 */
public String getBackingStoreDescription() throws FactoryException {
    return null;