Simplify code in dao classes.

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/dao/impl/JdbcCategoryDao.java

@@ -119,11 +119,7 @@ public Integer add(AddCategoryDbDto category) {
 
 	@Override
 	public long countAll() {
-		return jdbcTemplate.queryForObject(
-			countAllSql,
-			Collections.<String, Object>emptyMap(),
-			Long.class
-		);
+		return jdbcTemplate.queryForObject(countAllSql, Collections.emptyMap(), Long.class);
 	}
 
 	@Override

src/main/java/ru/mystamps/web/dao/impl/JdbcCollectionDao.java

@@ -89,7 +89,7 @@ public List<LinkEntityDto> findLastCreated(int quantity) {
 	public long countCollectionsOfUsers() {
 		return jdbcTemplate.queryForObject(
 			countCollectionsOfUsersSql,
-			Collections.<String, Object>emptyMap(),
+			Collections.emptyMap(),
 			Long.class
 		);
 	}

src/main/java/ru/mystamps/web/dao/impl/JdbcCountryDao.java

@@ -126,11 +126,7 @@ public Integer add(AddCountryDbDto country) {
 
 	@Override
 	public long countAll() {
-		return jdbcTemplate.queryForObject(
-			countAllSql,
-			Collections.<String, Object>emptyMap(),
-			Long.class
-		);
+		return jdbcTemplate.queryForObject(countAllSql, Collections.emptyMap(), Long.class);
 	}
 
 	@Override

src/main/java/ru/mystamps/web/dao/impl/JdbcSeriesDao.java

@@ -183,7 +183,7 @@ public void markAsModified(Integer seriesId, Date updatedAt, Integer updatedBy)
 	public List<SitemapInfoDto> findAllForSitemap() {
 		return jdbcTemplate.query(
 			findAllForSitemapSql,
-			Collections.<String, Object>emptyMap(),
+			Collections.emptyMap(),
 			RowMappers::forSitemapInfoDto
 		);
 	}
@@ -267,20 +267,12 @@ public List<PurchaseAndSaleDto> findPurchasesAndSales(Integer seriesId) {
 
 	@Override
 	public long countAll() {
-		return jdbcTemplate.queryForObject(
-			countAllSql,
-			Collections.<String, Object>emptyMap(),
-			Long.class
-		);
+		return jdbcTemplate.queryForObject(countAllSql, Collections.emptyMap(), Long.class);
 	}
 
 	@Override
 	public long countAllStamps() {
-		return jdbcTemplate.queryForObject(
-			countAllStampsSql,
-			Collections.<String, Object>emptyMap(),
-			Long.class
-		);
+		return jdbcTemplate.queryForObject(countAllStampsSql, Collections.emptyMap(), Long.class);
 	}
 
 	@Override